{"title":"Coral Fossil Collection","description":"\u003cspan style=\"color: #ff8000;\"\u003e\u003cstrong\u003eCorals\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e re-appeared during the Devonian period, around 410 million years ago and, for the first time, began to form extensive reef systems. These early coral reefs were predominantly composed of coral-like stromatoporoids (reef-forming sponges), tabulate corals (mounds, branches, and organ shapes), rugose corals (horn-shaped), and predecessors of the modern-day coralline algae (encrusting multi-colored algae seen on rock surfaces). It was towards the end of this period that scleractinian or ‘stony’ corals first appeared that populate coral reefs today. Then, 350 million years ago corals again disappeared from the geological record. The reason for this is not clear but evidence points towards rapid fluctuations in sea levels and a rapid reduction in atmospheric carbon dioxide\u003c\/span\u003e","products":[{"product_id":"4-8-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-02axx-582","title":"4.8\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona\u003c\/p\u003e\n\u003cp\u003eWeight: 10.2 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.8 Inches Long, 3.2 Inches Wide, 1.2 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003eThe Devonian period witnessed a pivotal moment in \u003cspan style=\"color: rgb(177, 93, 10);\"\u003e\u003cstrong\u003ecoral \u003c\/strong\u003e\u003c\/span\u003eevolution approximately 410 million years ago, when these organisms first constructed substantial reef complexes. Early Devonian reefs comprised a diverse assemblage of taxa: stromatoporoids functioning as primary reef architects, tabulate corals exhibiting varied morphologies (mounds, branches, and tubular forms), rugose corals with characteristic conical geometry, and primitive coralline algae species. The emergence of scleractinian corals—the modern reef-building taxa—occurred during the late Devonian. By 350 million years ago, corals had disappeared from the paleontological record, an extinction event attributed to oscillating sea levels and declining atmospheric CO₂ concentrations. This specimen exemplifies the geological significance of Devonian coral fauna and provides direct evidence of this critical evolutionary transition in marine ecosystems.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner","offers":[{"title":"Default Title","offer_id":39611612168294,"sku":"02AXX*582","price":37.09,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/products\/5U8A0647.JPG-2.jpg?v=1733513468"},{"product_id":"xl-6-red-bamboo-coral-branches-deep-sea-coral-color-enhanced-5-8-ounces-02axx-602","title":"XL 6\" Red Bamboo Coral Branches Deep-Sea Coral Color Enhanced 4.2 Ounces","description":"\u003cp\u003eLocation: China \u003c\/p\u003e\n\u003cp\u003eWeight: 4.2 Ounces \u003c\/p\u003e\n\u003cp\u003eDimensions: 6 Inches Long, 1.3 Inches Wide, 1.2 Inches Thick\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #38761d;\"\u003e\u003cstrong\u003eThe item pictured is the one you will receive.\u003c\/strong\u003e\u003c\/span\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #b86813;\"\u003e\u003cstrong\u003eBamboo coral\u003c\/strong\u003e\u003c\/span\u003e, family Isididae, is a family of mostly deep-sea coral of the phylum Cnidaria, class Anthozoa, and subclass Octocorallia. It is a commonly recognized inhabitant of the deep sea, due to the clearly articulated skeletons of the species. Red coral is one of the rarer types and is therefore considered precious in the jewelry industry. Bamboo coral, however, is not the same — naturally creamy white or gray, it is more prevalent than red coral and considered only semi-precious. When bamboo coral is dyed red to mimic the more precious red coral, it can be difficult to distinguish between the two.\u003c\/p\u003e\n\u003chr id=\"horizontalrule\"\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":39611825553510,"sku":"02AXX*602","price":104.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/products\/5U8A0802.JPG-2.jpg?v=1733513509"},{"product_id":"4-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy287","title":"4.1\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 8.8 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 4.1 Inches Long, 3.2 Inches Wide, 1.3 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"241\" data-end=\"568\"\u003e\u003cstrong data-start=\"241\" data-end=\"256\"\u003eHexagonaria\u003c\/strong\u003e is an extinct genus of colonial rugose coral that lived in ancient seas during the Devonian period, around 350 million years ago. These corals grew in large, rounded colonies composed of tightly packed hexagonal corallites, creating the striking geometric patterns for which they are well known.\u003c\/p\u003e\n\u003cp data-start=\"570\" data-end=\"946\"\u003eFossil specimens of Hexagonaria are preserved in Devonian limestone formations, with notable discoveries in Morocco, particularly in the Sahara Desert and the Assa Zag region. When polished, the internal structure of the coral becomes visible, revealing a central columella surrounded by fine radiating septae, which once supported the living coral polyps.\u003c\/p\u003e\n\u003cp data-start=\"948\" data-end=\"1329\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eHexagonaria is closely related to the famous Petoskey stone of Michigan, USA, identified as Hexagonaria percarinata. Valued for their natural color variations—ranging from light creams and tans to deeper brown tones—polished Hexagonaria corals are widely used in jewelry, decorative art, and fossil collections, combining visual beauty with deep geological history.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351020048664,"sku":"05JYY287","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2091_f243461b-61f3-43a7-8f1e-7cf715fdcfd1.jpg?v=1749662907"},{"product_id":"3-8-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy290","title":"3.8\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 8 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 3.8 Inches Long, 3 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"184\" data-end=\"529\"\u003e\u003cstrong data-start=\"184\" data-end=\"199\"\u003eHexagonaria\u003c\/strong\u003e is an extinct genus of colonial rugose coral that lived in warm, shallow seas during the Devonian period, approximately 350 million years ago. These corals developed as large, rounded colonies made up of tightly packed six-sided corallites, creating the distinctive geometric patterns visible in fossil specimens.\u003c\/p\u003e\n\u003cp data-start=\"531\" data-end=\"901\"\u003eHexagonaria fossils occur in Devonian-age limestone formations, with well-known examples coming from Morocco, particularly the Sahara Desert and the Assa Zag region. When cut and polished, the fossil reveals fine internal structures, including a central columella and radiating septae, which formed the skeletal framework of the ancient coral polyps.\u003c\/p\u003e\n\u003cp data-start=\"903\" data-end=\"1280\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eClosely related to the well-known Petoskey stone of Michigan, USA, identified as Hexagonaria percarinata, these fossils are admired for their natural range of colors—from pale creams to rich brown tones. Today, polished Hexagonaria coral is prized for jewelry, decorative objects, and fossil collections, blending geological history with striking visual appeal.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351025094936,"sku":"05JYY290","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2115_21ecb937-86be-4b44-be46-2f2781f2aeff.jpg?v=1749662828"},{"product_id":"3-9-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy292","title":"3.9\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 14.1 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 3.9 Inches Long, 3.3 Inches Wide, 1.7 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"172\" data-end=\"512\"\u003e\u003cstrong data-start=\"172\" data-end=\"187\"\u003eHexagonaria\u003c\/strong\u003e is an extinct genus of colonial rugose coral that lived in ancient marine environments during the Devonian period, roughly 350 million years ago. These corals formed large, rounded colonies composed of tightly packed hexagonal corallites, creating the distinctive geometric patterns for which they are known.\u003c\/p\u003e\n\u003cp data-start=\"514\" data-end=\"868\"\u003eWell-preserved Hexagonaria fossils occur in Devonian limestone deposits, with notable specimens coming from Morocco, particularly the Sahara Desert and Assa Zag region. Polishing these fossils reveals intricate internal structures, including a central columella and fine radiating septae, which once supported the living coral polyps.\u003c\/p\u003e\n\u003cp data-start=\"870\" data-end=\"1264\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eHexagonaria is closely related to the famous Petoskey stone of Michigan, USA, commonly identified as Hexagonaria percarinata. Appreciated for their natural color variations—ranging from light creams to rich brown tones—polished Hexagonaria corals are widely used in jewelry, decorative pieces, and fossil collections, combining scientific importance with striking visual appeal.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351029223704,"sku":"05JYY292","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2133_afa34196-8952-4c54-820c-41e620078f70.jpg?v=1749662791"},{"product_id":"3-1-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy294","title":"3.1\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 7.6 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 3.1 Inches Long, 2.8 Inches Wide, 1.2 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"161\" data-end=\"463\"\u003e\u003cstrong data-start=\"161\" data-end=\"176\"\u003eHexagonaria\u003c\/strong\u003e is an extinct genus of rugose coral that lived in ancient seas during the Devonian period, approximately 350 million years ago. These corals formed massive colonies composed of closely packed, six-sided corallites, giving the fossil its distinctive geometric appearance.\u003c\/p\u003e\n\u003cp data-start=\"465\" data-end=\"801\"\u003eSpecimens are preserved in Devonian limestone deposits and are commonly found in Morocco, particularly within the Sahara Desert and Assa Zag region. When polished, the internal skeletal structures become visible, including a central columella and radiating septae, which once supported the soft-bodied coral animals.\u003c\/p\u003e\n\u003cp data-start=\"803\" data-end=\"1093\"\u003eClosely related forms occur in Michigan, USA, where Hexagonaria percarinata is known as the Petoskey stone. Today, Hexagonaria fossils are valued both for their scientific significance and their decorative beauty, making them popular among collectors and artisans alike.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351032992024,"sku":"05JYY294","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2144_1357c232-8fde-4f73-a051-4954bcd4a72a.jpg?v=1749662726"},{"product_id":"4-4-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy296","title":"4.4\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 1 Pound 5.3 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 4.4 Inches Long, 3.3 Inches Wide, 2.9 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"157\" data-end=\"477\"\u003e\u003cstrong data-start=\"157\" data-end=\"172\"\u003eHexagonaria\u003c\/strong\u003e is a genus of colonial rugose corals that lived approximately 350 million years ago during the Devonian period. These fossils are recognized for their hexagonal corallites, each containing a central columella with radiating septae, creating a distinctive honeycomb-like pattern.\u003c\/p\u003e\n\u003cp data-start=\"479\" data-end=\"677\"\u003eFossils are found in Morocco, including the Sahara Desert and Assa Zag, as well as in Michigan, USA, where Hexagonaria percarinata is popularly known as the Petoskey stone.\u003c\/p\u003e\n\u003cp data-start=\"679\" data-end=\"958\"\u003eWhen polished, Hexagonaria coral displays beautiful patterns and natural hues, from light creams and browns to darker, earthy tones. These fossils are prized for jewelry, home décor, and collections, and provide a glimpse into ancient Devonian marine ecosystems.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351037776152,"sku":"05JYY296","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2158_ab469e5a-acc0-41da-8733-2cfb2956bb80.jpg?v=1749662929"},{"product_id":"4-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy297","title":"4\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 11.8 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 4 Inches Long, 3.1 Inches Wide, 1.5 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"155\" data-end=\"501\"\u003e\u003cstrong data-start=\"155\" data-end=\"170\"\u003eHexagonaria\u003c\/strong\u003e represents an extinct group of colonial rugose corals that inhabited warm, shallow seas during the Devonian period, around 350 million years ago. These corals grew as large, dome-shaped colonies made up of tightly arranged hexagonal corallites, producing the iconic honeycomb pattern visible in polished specimens.\u003c\/p\u003e\n\u003cp data-start=\"503\" data-end=\"830\"\u003eWell-preserved Hexagonaria fossils are recovered from Devonian limestone deposits, particularly in Morocco’s Sahara Desert and the Assa Zag region. Polishing reveals the coral’s internal architecture, including a prominent central columella and finely radiating septae, which once supported living coral polyps.\u003c\/p\u003e\n\u003cp data-start=\"832\" data-end=\"1208\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eHexagonaria is closely related to the famous Petoskey stone of Michigan, USA, commonly identified as Hexagonaria percarinata. Due to their intricate patterns and natural earth-toned coloration, these fossils are widely appreciated for jewelry making, interior décor, and private collections, while also serving as tangible records of ancient marine ecosystems.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351039643928,"sku":"05JYY297","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2168_fbca523f-1705-4cd3-8ca4-c96d759f1dd2.jpg?v=1749662895"},{"product_id":"3-1-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy299","title":"3.1\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 5.1 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.1 Inches Long, 2.3 Inches Wide, 0.9 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-end=\"474\" data-start=\"173\"\u003e\u003cspan style=\"color: rgb(137, 45, 11);\"\u003e\u003cstrong data-end=\"188\" data-start=\"173\"\u003eHexagonaria\u003c\/strong\u003e \u003c\/span\u003eis a genus of colonial rugose corals that lived during the Devonian period, roughly 350 million years ago. These fossils are distinguished by hexagonal corallites, each with a central columella and radiating septae, forming intricate, honeycomb-like patterns.\u003c\/p\u003e\n\u003cp data-end=\"653\" data-start=\"476\"\u003eFossils are found in Morocco (Sahara Desert, Assa Zag) and in Michigan, USA, where the species Hexagonaria percarinata is commonly known as the Petoskey stone.\u003c\/p\u003e\n\u003cp data-end=\"987\" data-start=\"655\"\u003eWhen polished, Hexagonaria coral reveals striking patterns and natural tones ranging from creams and browns to richer, earthy hues, making it popular for jewelry, decorative objects, and fossil collections. Its structure offers insight into Devonian marine environments and the morphology of ancient coral colonies.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351045247256,"sku":"05JYY299","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2183_a057714e-6edf-4d06-b830-ad3d613632d3.jpg?v=1749662744"},{"product_id":"3-9-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-05jyy305","title":"3.9\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp bis_size='{\"x\":12,\"y\":9,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":298}'\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":45,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":334}'\u003eWeight: 7.8 Ounces   \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":80,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":369}'\u003eDimensions: 3.9 Inches Long, 3.2 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":116,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cstrong bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003e\u003cspan style=\"color: #38761d;\" bis_size='{\"x\":12,\"y\":116,\"w\":293,\"h\":19,\"abs_x\":621,\"abs_y\":405}'\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":12,\"y\":151,\"w\":560,\"h\":19,\"abs_x\":621,\"abs_y\":440}'\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":187,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":476}'\u003e\n\u003cp data-start=\"180\" data-end=\"590\"\u003e\u003cspan style=\"color: rgb(198, 112, 27);\"\u003e\u003cstrong data-start=\"180\" data-end=\"195\"\u003eHexagonaria\u003c\/strong\u003e\u003c\/span\u003e is a genus of colonial rugose corals that dates back to the Devonian period, approximately 350 million years ago. These corals are recognized for their hexagonal corallite patterns and intricate skeletal structures, which are often enhanced when the fossils are polished. Hexagonaria commonly forms large, rounded heads in the rock formations where they are preserved.\u003c\/p\u003e\n\u003cp data-start=\"592\" data-end=\"964\"\u003eFossils of Hexagonaria are found in Morocco, particularly in the Sahara Desert and the Assa Zag region, as well as in Michigan, USA, where the species Hexagonaria percarinata is commonly known as the Petoskey stone. Each corallite features a central columella surrounded by radiating septae, forming the distinctive hexagonal pattern.\u003c\/p\u003e\n\u003cp data-start=\"966\" data-end=\"1286\"\u003ePolished Hexagonaria coral is highly valued for its aesthetic qualities. Natural hues range from creams and browns to deeper earthy tones, making each specimen unique. These fossils are popular for jewelry, home décor, and fossil collections due to their intricate patterns and geological significance.\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":570,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":859}'\u003e\n\u003cp bis_size='{\"x\":12,\"y\":579,\"w\":560,\"h\":336,\"abs_x\":621,\"abs_y\":868}'\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" bis_size='{\"x\":12,\"y\":579,\"w\":480,\"h\":332,\"abs_x\":621,\"abs_y\":868}'\u003e\u003c\/p\u003e\n\u003chr bis_size='{\"x\":12,\"y\":932,\"w\":560,\"h\":2,\"abs_x\":621,\"abs_y\":1221}'\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":50351106228504,"sku":"05JYY305","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2227_fabd0f1c-84fe-4b04-834d-5f483b886f6b.jpg?v=1749662787"},{"product_id":"5-8-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy670","title":"5.8\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.9 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 5.8 Inches Long, 1.6 Inches Wide, 0.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"83\" data-end=\"501\"\u003e\u003cspan style=\"color: rgb(191, 102, 13);\"\u003e\u003cstrong data-start=\"83\" data-end=\"102\"\u003ePetoskey Stones\u003c\/strong\u003e\u003c\/span\u003e are remarkable fossils, representing the ancient rugose coral Hexagonaria percarinata. Usually pebble-shaped, these stones are primarily found in the northwestern and northeastern parts of Michigan's Lower Peninsula. They are remnants of a Devonian-period coral reef, dating back approximately 350 million years, offering a rare glimpse into the marine ecosystems of that era.\u003c\/p\u003e\n\u003cp data-start=\"179\" data-end=\"492\"\u003ePetoskey stones were formed during glacial periods, when ice sheets plucked rocks from bedrock, smoothing rough edges and depositing them in specific areas. When dry, these stones appear as ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of fossilized corals.\u003c\/p\u003e\n\u003cp data-start=\"494\" data-end=\"939\"\u003eThe fossils belong to Hexagonaria percarinata, an extinct colonial coral composed of tightly packed, six-sided corallites—the skeletal structures of once-living coral polyps. Each corallite’s center contained the polyp’s mouth and tentacles, used to capture food. The hexagonal shape of each cell, along with the thin radial lines extending from the dark central “eye”, are unique identifying features of this fossil coral.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones can be found on various beaches and inland locations in Michigan, with many of the most popular Petoskey stone beaches stretching from Traverse City to Petoskey along Lake Michigan. The movement of the frozen lake ice during the winters is thought to expose new stones each spring. Popular locations for finding these stones include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers' fields.\u003cspan\u003e \u003c\/span\u003eThe best time to find them is often in the spring after the ice has shifted the shoreline.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402246426904,"sku":"05JYY670","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5480_63bab485-5500-4770-b0e7-dd181295abe0.jpg?v=1750812223"},{"product_id":"4-5-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy671","title":"4.5\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.9 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.5 Inches Long, 1.9 Inches Wide, 0.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(193, 101, 10);\"\u003e\u003cstrong data-start=\"78\" data-end=\"97\"\u003ePetoskey Stones\u003c\/strong\u003e\u003c\/span\u003e are unique rocks that are also fossils, specifically the fossilized rugose coral Hexagonaria percarinata. Typically pebble-shaped, these stones are found mainly in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of an ancient coral reef that flourished during the Devonian period, approximately 350 million years ago, preserving the intricate skeletal structures of these long-extinct corals.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones were formed through glaciation, where ice sheets plucked stones from the bedrock, grinding off their rough edges and depositing them in specific areas. \u003cspan\u003e \u003c\/span\u003eWhen dry, they resemble ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils.\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003eHexagonaria percarinata\u003cspan\u003e \u003c\/span\u003econsists of tightly packed, six-sided corallites, which are the skeletons of the once-living coral polyps. The center of each polyp was the mouth and contained tentacles that reached out for food. The hexagon shape of each cell and thin lines radiating out from the dark “eye” in the center are distinguishing features unique to this fossil.\u003c\/p\u003e\n\u003cp\u003eThese ancient coral fossils await discovery across Michigan's most compelling geological sites. From the Lake Michigan shoreline stretching between Traverse City and Petoskey to remote inland locations, Petoskey stones reward patient seekers year-round. Winter's relentless ice movement naturally exposes fresh specimens, making spring the prime collecting season when the shoreline transforms. Visit celebrated hotspots like Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach, or venture beyond the beaten path into gravel operations and agricultural areas where exceptional finds still emerge. Each stone tells a 375-million-year story—start your collection when conditions are ideal.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402281685272,"sku":"05JYY671","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5486_0a741dcc-1480-42df-ad37-369f64488caa.jpg?v=1750812402"},{"product_id":"3-5-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy673","title":"3.2\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.6 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.2 Inches Long, 1.7 Inches Wide, 0.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"61\" data-end=\"453\"\u003e\u003cspan style=\"color: rgb(180, 92, 5);\"\u003e\u003cstrong data-start=\"61\" data-end=\"80\"\u003ePetoskey Stones\u003c\/strong\u003e \u003c\/span\u003eare unique rocks and fossils, specifically the fossilized rugose coral Hexagonaria percarinata. Typically pebble-shaped, these stones are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are remnants of an ancient coral reef that thrived during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp data-start=\"455\" data-end=\"1176\"\u003ePetoskey stones were formed through glacial activity, when ice sheets plucked them from the bedrock, smoothing rough edges and depositing them in new locations. When dry, these stones may appear to be ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils. Each fossil consists of tightly packed, six-sided corallites, which are the skeletal remains of once-living coral polyps. The center of each polyp housed the mouth, with tentacles that extended outward to capture food. The hexagonal shape of each cell and the thin lines radiating from the dark central “eye” are unique features that make Petoskey stones instantly recognizable.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones can be found on various beaches and inland locations in Michigan, with many of the most popular Petoskey stone beaches stretching from Traverse City to Petoskey along Lake Michigan. The movement of the frozen lake ice during the winters is thought to expose new stones each spring. Popular locations for finding these stones include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers' fields.\u003cspan\u003e \u003c\/span\u003eThe best time to find them is often in the spring after the ice has shifted the shoreline.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402287223064,"sku":"05JYY673","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5498_b3905716-1760-4d9a-aa7a-59ef99b705d8.jpg?v=1750812331"},{"product_id":"5-9-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy674","title":"5.9\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 6.2 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 5.9 Inches Long, 2.2 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(148, 74, 10);\"\u003e\u003cstrong\u003eP\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(122, 61, 7);\"\u003e\u003cstrong\u003eetoskey Stone\u003c\/strong\u003e\u003c\/span\u003e is a unique rock and fossil, specifically a fossilized rugose coral known as\u003cspan\u003e \u003c\/span\u003eHexagonaria percarinata.\u003cspan\u003e \u003c\/span\u003eThese stones are typically pebble-shaped and are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of a coral reef that existed during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp data-start=\"75\" data-end=\"414\"\u003ePetoskey stones were formed through glaciation, when ice sheets plucked stones from the bedrock, grinding off their rough edges and depositing them in new locations. When dry, these stones may appear to be ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils.\u003c\/p\u003e\n\u003cp data-start=\"416\" data-end=\"853\"\u003eThe fossilized coral, Hexagonaria percarinata, is made up of tightly packed, six-sided corallites, which are the skeletal remains of once-living coral polyps. The center of each polyp served as its mouth, with tentacles extending outward to capture food. The hexagonal shape of each cell and the thin radial lines radiating from the dark central “eye” are unique features that make these fossils instantly recognizable.\u003c\/p\u003e\n\u003cp data-start=\"855\" data-end=\"1372\"\u003ePetoskey stones can be found on beaches and inland locations throughout Michigan, with some of the most popular beaches stretching from Traverse City to Petoskey along Lake Michigan. The movement of frozen lake ice during the winter often exposes new stones in the spring, making this the prime time for collectors. Well-known sites include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers’ fields.\u003c\/p\u003e\n\u003cp data-start=\"1374\" data-end=\"1546\"\u003eThe best time to find Petoskey stones is typically in spring, after ice and seasonal changes have shifted the shoreline, revealing fresh specimens for collection.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402288664856,"sku":"05JYY674","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5504_3f8be29a-ae6d-4aa1-a5b9-4463b870e819.jpg?v=1750812411"},{"product_id":"4-2-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy675","title":"4.2\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.4 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.2 Inches Long, 1.7 Inches Wide, 0.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"80\" data-end=\"482\"\u003e\u003cspan style=\"color: rgb(167, 91, 15);\"\u003e\u003cstrong data-start=\"80\" data-end=\"99\"\u003ePetoskey Stones\u003c\/strong\u003e\u003c\/span\u003e are unique rocks and fossils, specifically fossilized rugose coral known as Hexagonaria percarinata. Typically pebble-shaped, these stones are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of an ancient coral reef that thrived during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp data-start=\"484\" data-end=\"1163\"\u003ePetoskey stones were shaped through glacial activity, when ice sheets plucked stones from the bedrock, smoothing rough edges and depositing them in new locations. When dry, these stones may look like ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils. Each fossil consists of tightly packed, six-sided corallites, the skeletal remains of once-living coral polyps. The center of each polyp housed the mouth, with tentacles extending outward to capture food. The hexagonal shape and thin radial lines radiating from the dark central “eye” are distinguishing features unique to these fossils.\u003c\/p\u003e\n\u003cp data-start=\"1165\" data-end=\"1807\"\u003ePetoskey stones can be found on numerous beaches and inland locations throughout Michigan. Many of the most popular beaches stretch from Traverse City to Petoskey along Lake Michigan, where the movement of frozen lake ice during winter often exposes new stones in the spring. Well-known collection sites include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers’ fields. The best time to find Petoskey stones is typically in spring, after ice and seasonal changes have shifted the shoreline and revealed fresh specimens.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402292072728,"sku":"05JYY675","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5510_ae8abfb6-2dd8-4a46-a4b6-1793422a95a6.jpg?v=1750812335"},{"product_id":"3-4-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy676","title":"3.4\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.1 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.4 Inches Long, 2.6 Inches Wide, 0.5 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(148, 74, 10);\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003eThis remarkable specimen represents Hexagonaria percarinata, an ancient rugose coral preserved as stone and Michigan's official state fossil. Originating from a thriving reef system during the Devonian epoch, roughly 350 million years ago, the \u003cspan style=\"color: rgb(185, 103, 21);\"\u003e\u003cstrong\u003ePetoskey Stone\u003c\/strong\u003e\u003c\/span\u003e embodies deep geological history. The characteristic hexagonal patterns adorning its surface reveal the intricate skeletal structure of the original coral colony. Naturally occurring throughout Michigan's Lower Peninsula, these polished slabs showcase the elegant geometry and lustrous finish that make them prized by collectors and enthusiasts of paleontological specimens.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones were formed through glaciation, where ice sheets plucked stones from the bedrock, grinding off their rough edges and depositing them in specific areas. \u003cspan\u003e \u003c\/span\u003eWhen dry, they resemble ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils.\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003eHexagonaria percarinata\u003cspan\u003e \u003c\/span\u003econsists of tightly packed, six-sided corallites, which are the skeletons of the once-living coral polyps. The center of each polyp was the mouth and contained tentacles that reached out for food. The hexagon shape of each cell and thin lines radiating out from the dark “eye” in the center are distinguishing features unique to this fossil.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones can be found on various beaches and inland locations in Michigan, with many of the most popular Petoskey stone beaches stretching from Traverse City to Petoskey along Lake Michigan. The movement of the frozen lake ice during the winters is thought to expose new stones each spring. Popular locations for finding these stones include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers' fields.\u003cspan\u003e \u003c\/span\u003eThe best time to find them is often in the spring after the ice has shifted the shoreline.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402295415064,"sku":"05JYY676","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5516_984dab06-0359-43fb-9620-92dc03afc040.jpg?v=1750812266"},{"product_id":"4-8-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy677","title":"4.8\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 3.3 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.8 Inches Long, 2.3 Inches Wide, 0.4 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(148, 74, 10);\"\u003e\u003cstrong\u003eP\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(122, 61, 7);\"\u003e\u003cstrong\u003eetoskey Stone\u003c\/strong\u003e\u003c\/span\u003e is a unique rock and fossil, specifically a fossilized rugose coral known as\u003cspan\u003e \u003c\/span\u003eHexagonaria percarinata.\u003cspan\u003e \u003c\/span\u003eThese stones are typically pebble-shaped and are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of a coral reef that existed during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp\u003eGlacial forces sculpted these remarkable specimens over millennia, as massive ice sheets tore them from ancient bedrock and relentlessly polished their surfaces into smooth, exhibition-ready forms. Deceptively plain when dry, these stones transform dramatically upon contact with water or professional finishing—revealing an intricate mosaic of hexagonal coral chambers that once housed living polyps hunting for sustenance in Devonian seas. Each six-sided cell represents a skeletal vault, its geometric precision interrupted by a dark central \"eye\" surrounded by radiating lines—the unmistakable signature of Hexagonaria percarinata. This architectural perfection, preserved for 375 million years, captures a frozen moment when countless coral polyps thrived in Michigan's ancient tropical waters, their geometric legacy now exposed to modern eyes through nature's most powerful tool: ice.\u003c\/p\u003e\n\u003cp\u003eThese ancient coral fossils emerge across Michigan's diverse landscape—from the windswept Lake Michigan beaches stretching between Traverse City and Petoskey to hidden inland excavations. Winter's relentless freeze-thaw cycle acts as nature's prospector, dislodging specimens and revealing fresh treasures as spring arrives. Seasoned hunters converge on established sites like Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach, but the real finds await those willing to venture into less-traveled territory: abandoned road cuts, active gravel mines, and sprawling agricultural fields. Spring represents peak season when the ice's grip loosens and exposes these 375-million-year-old prizes. Success demands timing, persistence, and the courage to explore where few collectors dare to tread.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402298036504,"sku":"05JYY677","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5522_d52970bc-2645-4614-9880-1bf6de61f8a5.jpg?v=1750812345"},{"product_id":"3-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy680","title":"3.5\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.4 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.5 Inches Long, 1.6 Inches Wide, 0.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(148, 74, 10);\"\u003e\u003cstrong\u003eP\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(122, 61, 7);\"\u003e\u003cstrong\u003eetoskey Stone\u003c\/strong\u003e\u003c\/span\u003e is a unique rock and fossil, specifically a fossilized rugose coral known as\u003cspan\u003e \u003c\/span\u003eHexagonaria percarinata.\u003cspan\u003e \u003c\/span\u003eThese stones are typically pebble-shaped and are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of a coral reef that existed during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp\u003eGlacial processes shaped these remarkable specimens, as ancient ice sheets extracted stones from bedrock, naturally polishing their surfaces and concentrating them in Michigan's distinctive deposits. In their dry state, Petoskey stones appear as unremarkable limestone, yet moisture or deliberate polishing unveils their extraordinary character—an intricate mosaic of hexagonal coral fossils. Each geometric cell represents the skeletal remains of Hexagonaria percarinata polyps, colonial organisms that once extended tentacles from their central mouths to capture sustenance. The defining aesthetic of this fossil lies in its precise hexagonal architecture and the delicate radiating lines converging toward the dark central \"eye\" of each corallite, characteristics that distinguish this Devonian treasure from all other fossilized coral forms.\u003c\/p\u003e\n\u003cp\u003eMichigan's shorelines and inland regions harbor these remarkable Devonian-era fossils, particularly along the Lake Michigan coast between Traverse City and Petoskey. Seasonal ice movement throughout winter naturally exposes fresh specimens each spring, making this the optimal collecting season. Petoskey stones emerge from diverse environments—pristine beaches, state parks, gravel operations, and agricultural lands—with notable recovery sites including Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. The dynamic geological processes that continually redistribute these ancient coral remnants ensure that dedicated collectors discover new examples year after year, especially following winter's transformative ice shifts.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"Colorful coral reef underwater with vibrant marine life\" width=\"500\" height=\"500\" loading=\"lazy\" decoding=\"async\" style=\"max-width: 100%; height: auto; margin: 0 auto;\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402303934744,"sku":"05JYY680","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5541_40f33ff1-0825-458e-bbc1-35e4d1ee4952.jpg?v=1750812396"},{"product_id":"2-9-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy681","title":"2.9\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 0.8 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.9 Inches Long, 1.3 Inches Wide, 0.2 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(148, 74, 10);\"\u003e\u003cstrong\u003eP\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(122, 61, 7);\"\u003e\u003cstrong\u003eetoskey Stone\u003c\/strong\u003e\u003c\/span\u003e is a unique rock and fossil, specifically a fossilized rugose coral known as\u003cspan\u003e \u003c\/span\u003eHexagonaria percarinata.\u003cspan\u003e \u003c\/span\u003eThese stones are typically pebble-shaped and are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of a coral reef that existed during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp data-end=\"426\" data-start=\"78\"\u003ePetoskey stones were formed through glaciation, during which ice sheets plucked stones from the bedrock, grinding down their rough edges and depositing them in new locations. When dry, these stones may appear to be ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils.\u003c\/p\u003e\n\u003cp data-end=\"916\" data-start=\"428\"\u003eThe fossilized coral, Hexagonaria percarinata, is composed of tightly packed, six-sided corallites, which are the skeletal remains of once-living coral polyps. The center of each polyp served as its mouth, surrounded by tentacles that extended outward to capture food. The hexagonal shape of each corallite and the thin radial lines radiating from the dark central “eye” are unique features that make these fossils instantly recognizable and highly valued by collectors.\u003c\/p\u003e\n\u003cp data-end=\"406\" data-start=\"61\"\u003ePetoskey stones can be found on numerous beaches and inland locations throughout Michigan, with many of the most popular sites stretching from Traverse City to Petoskey along Lake Michigan. The movement of frozen lake ice during the winter is thought to reveal new stones each spring, making this the prime time for collectors.\u003c\/p\u003e\n\u003cp data-end=\"812\" data-start=\"408\"\u003eWell-known locations for finding Petoskey stones include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. In addition to beaches, rockhounds often search cut roadbeds, gravel pits, and farmers’ fields for these fossils. The best time to collect Petoskey stones is typically in the spring, after the ice has shifted the shoreline and uncovered fresh specimens.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: center; margin: 0;\"\u003e\u003cimg style=\"max-width: 100%; height: auto;\" decoding=\"async\" loading=\"lazy\" height=\"500\" width=\"400\" alt=\"Beautiful coral reef underwater\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402304819480,"sku":"05JYY681","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5547_880b21b7-76a7-441b-bba7-f26b7596018a.jpg?v=1750812307"},{"product_id":"2-6-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy682","title":"2.6\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.9 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.6 Inches Long, 1.6 Inches Wide, 0.5 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"61\" data-end=\"454\"\u003e\u003cspan style=\"color: rgb(199, 105, 11);\"\u003e\u003cstrong data-start=\"61\" data-end=\"80\"\u003ePetoskey Stones\u003c\/strong\u003e\u003c\/span\u003e are unique rocks and fossils, specifically the fossilized rugose coral Hexagonaria percarinata. Typically pebble-shaped, these stones are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are fragments of an ancient coral reef that thrived during the Devonian period, approximately 350 million years ago.\u003c\/p\u003e\n\u003cp data-start=\"456\" data-end=\"1156\"\u003eThese stones were formed through glaciation, when ice sheets plucked them from the bedrock, smoothing rough edges and depositing them in new locations. When dry, Petoskey stones may resemble ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils. Each fossil consists of tightly packed, six-sided corallites, the skeletal remains of once-living coral polyps. The center of each polyp housed the mouth, with tentacles extending outward to capture food. The hexagonal shape of each cell, along with thin lines radiating from the dark central “eye,” is are unique features that make these fossils instantly recognizable.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones can be found on various beaches and inland locations in Michigan, with many of the most popular Petoskey stone beaches stretching from Traverse City to Petoskey along Lake Michigan. The movement of the frozen lake ice during the winters is thought to expose new stones each spring. Popular locations for finding these stones include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers' fields.\u003cspan\u003e \u003c\/span\u003eThe best time to find them is often in the spring after the ice has shifted the shoreline.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402306654488,"sku":"05JYY682","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5557_f7c7342b-b1ee-407d-98e5-5143476b86ba.jpg?v=1750812415"},{"product_id":"4-3-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy683","title":"4.3\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.1 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.3 Inches Long, 1.4 Inches Wide, 0.4 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"129\" data-end=\"565\"\u003e\u003cspan style=\"color: rgb(179, 95, 11);\"\u003e\u003cstrong data-start=\"129\" data-end=\"148\"\u003ePetoskey Stones\u003c\/strong\u003e\u003c\/span\u003e are unique rocks and fossils, specifically the fossilized rugose coral Hexagonaria percarinata. Typically pebble-shaped, these stones are found mainly in the northwestern and northeastern regions of Michigan's Lower Peninsula. They are remnants of a coral reef that thrived during the Devonian period, approximately 350 million years ago, preserving intricate structures of ancient marine life.\u003c\/p\u003e\n\u003cp data-start=\"567\" data-end=\"1301\"\u003eThe formation of Petoskey stones is closely tied to glacial activity. Ice sheets plucked stones from the bedrock, smoothing rough edges and depositing them in new locations. When dry, these stones may resemble ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils. Each Hexagonaria percarinata fossil consists of tightly packed, six-sided corallites, the skeletal remains of once-living coral polyps. The center of each polyp housed the mouth, with tentacles extending outward to capture food. The hexagonal shape and thin radial lines emanating from the dark central “eye” are unique features that make Petoskey stones instantly recognizable.\u003c\/p\u003e\n\u003cp data-start=\"1303\" data-end=\"1917\"\u003ePetoskey stones can be found on various beaches and inland locations throughout Michigan. Many of the most popular beaches stretch from Traverse City to Petoskey along Lake Michigan, where the movement of frozen lake ice during winter exposes new stones each spring. Well-known locations include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search roadbeds, gravel pits, and farmers’ fields for these treasures. The best time to find Petoskey stones is typically in spring, after the ice has shifted the shoreline, revealing fresh specimens.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"Colorful coral reef underwater with vibrant marine life\" width=\"400\" height=\"500\" loading=\"lazy\" decoding=\"async\" style=\"max-width: 100%; height: auto; margin: 0 auto;\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402308391192,"sku":"05JYY683","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5559_b4448814-4a36-40af-9625-6a89ee50daeb.jpg?v=1750812256"},{"product_id":"4-4-polished-slab-petoskey-stone-hexagonaria-coral-fossil-devonian-age-michigan-05jyy689","title":"4.4\" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan","description":"\u003cp\u003eLocation: Michigan, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 3.8 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.4 Inches Long, 3.8 Inches Wide, 0.2 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(212, 116, 20);\"\u003e\u003cstrong data-start=\"78\" data-end=\"97\"\u003ePetoskey Stones\u003c\/strong\u003e \u003c\/span\u003eare unique rocks that also serve as fossils, specifically of the rugose coral Hexagonaria percarinata. Typically pebble-shaped, these stones are found primarily in the northwestern and northeastern regions of Michigan’s Lower Peninsula. They are remnants of an ancient coral reef that thrived during the Devonian period, around 350 million years ago, preserving the intricate structure of the coral and offering a glimpse into Earth’s distant marine past.\u003c\/p\u003e\n\u003cp data-start=\"69\" data-end=\"418\"\u003ePetoskey stones were formed through glacial activity, where advancing ice sheets plucked stones from the bedrock, smoothing rough edges and depositing them in specific locations. When dry, these stones may look like ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils.\u003c\/p\u003e\n\u003cp data-start=\"420\" data-end=\"925\"\u003eThe fossilized coral, Hexagonaria percarinata, consists of tightly packed, six-sided corallites, which are the skeletal remains of individual coral polyps. Each corallite’s center was once the mouth of the polyp, surrounded by tentacles that extended outward to capture food. The hexagonal shape of each cell, along with the thin radial lines emanating from the dark central “eye,” are unique features that make Petoskey stones instantly recognizable and highly prized by collectors.\u003c\/p\u003e\n\u003cp\u003ePetoskey stones can be found on various beaches and inland locations in Michigan, with many of the most popular Petoskey stone beaches stretching from Traverse City to Petoskey along Lake Michigan. The movement of the frozen lake ice during the winters is thought to expose new stones each spring. Popular locations for finding these stones include Petoskey State Park, Magnus City Park Beach, and Solanus Mission Beach. Rockhounds also search cut roadbeds, gravel pits, and farmers' fields.\u003cspan\u003e \u003c\/span\u003eThe best time to find them is often in the spring after the ice has shifted the shoreline.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"Quartsite Morocco","offers":[{"title":"Default Title","offer_id":50402323726616,"sku":"05JYY689","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A5595_d71ef54d-4f68-436c-8073-78beea2a29b8.jpg?v=1750812369"},{"product_id":"2-8-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott323","title":"2.8\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.5 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.8 Inches Long, 1.6 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"116\" data-end=\"669\"\u003eAround 410 million years ago, during the Devonian period, \u003cspan style=\"color: rgb(177, 92, 7);\"\u003e\u003cstrong\u003ecorals \u003c\/strong\u003e\u003c\/span\u003ere-emerged and began forming the first extensive reef systems. These early reefs were vibrant and complex underwater structures, built primarily by stromatoporoids, coral-like sponges that provided a sturdy framework; tabulate corals, which grew into mounds, branches, and organ-like shapes; rugose corals, horn-shaped species adding vertical dimension; and the ancestors of modern coralline algae, colorful encrusting algae that helped cement the reef together.\u003c\/p\u003e\n\u003cp data-start=\"671\" data-end=\"910\"\u003eBy the end of the Devonian, scleractinian, or “stony,” corals appeared for the first time. These corals laid down hard calcium carbonate skeletons and became the foundation for the modern coral reefs that dominate today’s oceans.\u003c\/p\u003e\n\u003cp data-start=\"912\" data-end=\"1317\"\u003eHowever, approximately 350 million years ago, corals disappeared from the fossil record. While the exact cause remains uncertain, research suggests that rapid sea-level changes and a sudden drop in atmospheric carbon dioxide disrupted reef ecosystems, leading to their decline. Despite this setback, corals would later recover, continuing their long evolutionary story in the world’s oceans.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50780935389464,"sku":"05OTT323","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2979_8a6cdc3c-c3bc-458d-bfdb-4fc46c42fb8a.jpg?v=1760723458"},{"product_id":"2-9-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott324","title":"3.6\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 3.1 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.6 Inches Long, 2.9 Inches Wide, 0.8 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"106\" data-end=\"643\"\u003eAround 410 million years ago, during the Devonian period, \u003cspan style=\"color: rgb(190, 99, 8);\"\u003e\u003cstrong\u003ecorals \u003c\/strong\u003e\u003c\/span\u003ere-emerged and began building the first large reef systems. These early reefs were bustling underwater communities, primarily formed by stromatoporoids (reef-building sponges that acted as structural pillars), tabulate corals (creating mounds, branches, and organ-like shapes), rugose corals (horn-shaped corals adding vertical complexity), and the ancestors of modern coralline algae (encrusting, colorful algae that helped stabilize the reefs).\u003c\/p\u003e\n\u003cp data-start=\"645\" data-end=\"848\"\u003eBy the end of the Devonian, scleractinian, or “stony,” corals appeared for the first time. These corals would eventually dominate modern reefs, thanks to their hard calcium carbonate skeletons.\u003c\/p\u003e\n\u003cp data-start=\"850\" data-end=\"1143\"\u003eHowever, around 350 million years ago, corals vanished from the fossil record. The exact cause is still debated, but evidence points to rapid sea-level changes and a sudden drop in atmospheric carbon dioxide, which likely disrupted reef ecosystems and led to their disappearance.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg height=\"424\" width=\"613\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50780958163224,"sku":"05OTT324","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2985_c38e05c1-643e-49c1-bbee-f94d8bd3522d.jpg?v=1760723720"},{"product_id":"2-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott325","title":"2.1\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.8 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.1 Inches Long, 1.5 Inches Wide, 1.4 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"132\" data-end=\"171\"\u003e\u003cstrong data-start=\"132\" data-end=\"169\"\u003eTimeline of Early Coral Evolution\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"173\" data-end=\"1251\"\u003e\n\u003cli data-start=\"173\" data-end=\"770\"\u003e\n\u003cp data-start=\"175\" data-end=\"364\"\u003e\u003cstrong data-start=\"175\" data-end=\"220\"\u003e~410 million years ago (Devonian Period):\u003c\/strong\u003e\u003cbr data-start=\"220\" data-end=\"223\"\u003e\u003cspan style=\"color: rgb(193, 104, 15);\"\u003e\u003cstrong\u003eCorals \u003c\/strong\u003e\u003c\/span\u003ere-emerged and formed their first extensive reef systems, creating complex habitats for marine life. Early reef builders included:\u003c\/p\u003e\n\u003cul data-start=\"367\" data-end=\"770\"\u003e\n\u003cli data-start=\"367\" data-end=\"454\"\u003e\n\u003cp data-start=\"369\" data-end=\"454\"\u003e\u003cstrong data-start=\"369\" data-end=\"388\"\u003eStromatoporoids\u003c\/strong\u003e – coral-like sponges that provided a solid framework for reefs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"457\" data-end=\"572\"\u003e\n\u003cp data-start=\"459\" data-end=\"572\"\u003e\u003cstrong data-start=\"459\" data-end=\"478\"\u003eTabulate corals\u003c\/strong\u003e – shaped into mounds, branches, and organ-like structures, contributing to reef complexity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"575\" data-end=\"653\"\u003e\n\u003cp data-start=\"577\" data-end=\"653\"\u003e\u003cstrong data-start=\"577\" data-end=\"594\"\u003eRugose corals\u003c\/strong\u003e – horn-shaped corals adding vertical structure to reefs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"656\" data-end=\"770\"\u003e\n\u003cp data-start=\"658\" data-end=\"770\"\u003e\u003cstrong data-start=\"658\" data-end=\"697\"\u003eAncestors of modern coralline algae\u003c\/strong\u003e – colorful, encrusting algae that helped bind reef materials together.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"772\" data-end=\"985\"\u003e\n\u003cp data-start=\"774\" data-end=\"985\"\u003e\u003cstrong data-start=\"774\" data-end=\"805\"\u003eEnd of the Devonian Period:\u003c\/strong\u003e\u003cbr data-start=\"805\" data-end=\"808\"\u003eScleractinian (“stony”) corals first appeared. These corals produced hard calcium carbonate skeletons and became the foundation of the reefs that dominate modern oceans.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"987\" data-end=\"1251\"\u003e\n\u003cp data-start=\"989\" data-end=\"1251\"\u003e\u003cstrong data-start=\"989\" data-end=\"1016\"\u003e~350 million years ago:\u003c\/strong\u003e\u003cbr data-start=\"1016\" data-end=\"1019\"\u003eCorals disappeared from the fossil record. While the exact cause remains uncertain, rapid sea-level fluctuations and a sudden drop in atmospheric carbon dioxide likely disrupted reef ecosystems, leading to their decline.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg height=\"424\" width=\"613\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50780998041880,"sku":"05OTT325","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2991_33e899b5-b24f-4e59-b138-504e8ce85913.jpg?v=1760723718"},{"product_id":"2-2-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott326","title":"2.2\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.5 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.2 Inches Long, 1.3 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"91\" data-end=\"500\"\u003e\u003cspan style=\"color: rgb(179, 97, 15);\"\u003e\u003cstrong\u003eCorals \u003c\/strong\u003e\u003c\/span\u003ereappeared during the Devonian period, around 410 million years ago, when they first began forming extensive reef systems. These early reefs were made up of stromatoporoids (reef-building sponges), tabulate corals (forming mounds, branches, and organ-like shapes), rugose corals (horn-shaped), and the ancestors of modern coralline algae (encrusting, colorful algae on rocks).\u003c\/p\u003e\n\u003cp data-start=\"502\" data-end=\"866\"\u003eBy the end of the Devonian, scleractinian, or “stony,” corals—the type that now dominates today’s reefs—emerged. Yet, approximately 350 million years ago, corals disappeared from the fossil record. Although the exact cause is uncertain, evidence points to rapid sea-level changes and a sudden drop in atmospheric carbon dioxide as likely factors.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50781081338136,"sku":"05OTT326","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3000_7e91cfed-60a2-4432-a258-f76b81f5cac7.jpg?v=1760723437"},{"product_id":"2-4-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott327","title":"1.9\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.5 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 1.9 Inches Long, 1.7 Inches Wide, 1.7 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"87\" data-end=\"513\"\u003e\u003cspan style=\"color: rgb(209, 123, 38);\"\u003e\u003cstrong\u003eCorals \u003c\/strong\u003e\u003c\/span\u003emade a comeback during the Devonian period, about 410 million years ago, forming the first large reef systems in Earth’s history. These reefs were built primarily by stromatoporoids (reef-forming sponges), tabulate corals (shaped into mounds, branches, and organ-like forms), rugose corals (horn-shaped), and the early ancestors of modern coralline algae (encrusting, colorful algae on rocks).\u003c\/p\u003e\n\u003cp data-start=\"515\" data-end=\"912\"\u003eTowards the end of the Devonian, scleractinian, or “stony,” corals—which now dominate modern coral reefs—appeared for the first time. However, around 350 million years ago, corals vanished from the fossil record. While the exact cause is still unknown, research suggests that rapid sea-level fluctuations and a sharp decline in atmospheric carbon dioxide were likely responsible.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg height=\"424\" width=\"613\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50781127409944,"sku":"05OTT327","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3010_3c8d8dbf-b1e7-44be-b5d9-e80af1806cdf.jpg?v=1760723510"},{"product_id":"3-5-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott329","title":"3.5\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.7 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.5 Inches Long, 2.8 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"123\" data-end=\"559\"\u003e\u003cspan style=\"color: rgb(206, 114, 22);\"\u003e\u003cstrong\u003eCorals \u003c\/strong\u003e\u003c\/span\u003ere-emerged during the Devonian period, around 410 million years ago, marking the first time they formed extensive reef systems. These early reefs were primarily made up of coral-like stromatoporoids (reef-building sponges), tabulate corals (forming mounds, branches, and organ-like shapes), rugose corals (horn-shaped), and ancestors of modern coralline algae (encrusting, multi-colored algae on rocks).\u003c\/p\u003e\n\u003cp data-start=\"561\" data-end=\"926\"\u003eNear the end of the Devonian, scleractinian, or “stony,” corals—which dominate modern coral reefs—first appeared. However, around 350 million years ago, corals vanished from the fossil record once again. The exact cause is unclear, but evidence suggests it was likely due to rapid sea-level changes and a sudden drop in atmospheric carbon dioxide.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50781235282200,"sku":"05OTT329","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3032_39fe7567-9ac1-451b-b5c8-cc78ce67b109.jpg?v=1760723489"},{"product_id":"3-2-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott333","title":"2.8\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 4.3 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.8 Inches Long, 3.7 Inches Wide, 1.4 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"136\" data-end=\"578\"\u003e\u003cspan style=\"color: rgb(201, 111, 21);\"\u003e\u003cstrong\u003eCorals \u003c\/strong\u003e\u003c\/span\u003ere-emerged during the Devonian period, around 410 million years ago, marking the first time they formed extensive reef systems. These early reefs were primarily composed of coral-like stromatoporoids (reef-building sponges), tabulate corals (which formed mounds, branches, and organ-like shapes), rugose corals (horn-shaped), and ancestors of modern coralline algae (encrusting, multi-colored algae on rocks).\u003c\/p\u003e\n\u003cp data-start=\"580\" data-end=\"994\"\u003eNear the end of the Devonian, scleractinian, or “stony,” corals—the dominant coral type in today’s reefs—first appeared. However, around 350 million years ago, corals disappeared from the fossil record once again. The precise cause of this disappearance is unclear, but evidence points to rapid sea-level changes and a sudden drop in atmospheric carbon dioxide as likely contributing factors.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg height=\"424\" width=\"613\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50781449945368,"sku":"05OTT333","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3059_f6160f53-f17e-4ec2-8cde-004e8a1af952.jpg?v=1760723651"},{"product_id":"2-3-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott334","title":"2.3\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 1.6 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.3 Inches Long, 1.3 Inches Wide,1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003c\/span\u003e\u003c\/strong\u003eThe Devonian period, commencing roughly 410 million years ago, witnessed \u003cspan style=\"color: rgb(199, 106, 14);\"\u003e\u003cstrong\u003ecoral \u003c\/strong\u003e\u003c\/span\u003eorganisms establishing themselves as architects of Earth's inaugural reef ecosystems. These primordial reef communities were principally composed of stromatoporoids—sponge-like reef constructors—in concert with tabulate corals exhibiting varied architectural forms, including domed and branching configurations, rugose corals distinguished by their conical structure, and nascent coralline algae species that adorned substrate surfaces with polychromatic patterns. The epoch culminated in the inaugural appearance of scleractinian corals, the progenitors of contemporary reef-dominant species. This flourishing coral assemblage persisted until approximately 350 million years before present, when corals underwent sudden extirpation from the paleontological record. While the precise etiology remains enigmatic, paleoclimatic evidence implicates pronounced oscillations in marine transgression-regression cycles coupled with a marked atmospheric carbon dioxide depletion as causative factors in this biotic event.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50781499293976,"sku":"05OTT334","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3067_d16893ee-e6c8-4a50-8476-9a14e314215d.jpg?v=1760723409"},{"product_id":"2-1-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott335","title":"2.1\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.5 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.1 Inches Long, 2.1 Inches Wide, 1 Inch Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #bb6e18;\"\u003eCorals\u003c\/span\u003e\u003c\/strong\u003e re-emerged during the Devonian period, around 410 million years ago, marking the first time they formed extensive reef systems. These early reefs mainly consisted of coral-like stromatoporoids (reef-building sponges), tabulate corals (which created mounds, branches, and organ-like shapes), rugose corals (horn-shaped), and ancestors of modern coralline algae (encrusting, multi-colored algae on rocks). Near the end of this period, scleractinian or ‘stony’ corals, which dominate today's coral reefs, first appeared. However, about 350 million years ago, corals disappeared from the fossil record again. The exact cause is unclear, but evidence suggests it was due to rapid sea-level changes and a sudden drop in atmospheric carbon dioxide.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50782138695960,"sku":"05OTT335","price":26.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3073_02bc2ff0-bfc6-4dc5-af4e-eda72a78ea91.jpg?v=1760723682"},{"product_id":"2-2-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott336","title":"2.2\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.2 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.2 Inches Long, 1.7 Inches Wide, 1.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003c\/span\u003e\u003c\/strong\u003eDare to possess a relic from nature's boldest experiment in reef construction. The Devonian period—410 million years ago—unleashed \u003cspan style=\"color: rgb(169, 91, 13);\"\u003e\u003cstrong\u003ecorals \u003c\/strong\u003e\u003c\/span\u003einto the oceans with audacious force, spawning the planet's first monumental reef systems. These fearless underwater pioneers included stromatoporoids that engineered reef foundations, tabulate corals that dared branch into myriad sculptural forms, rugose corals with their striking horn-like silhouettes, and vibrant coralline algae ancestors that blazed color across ancient seabeds. As the era intensified, scleractinian corals emerged—the very architects of today's thriving reefs. Yet ambition met catastrophe. By 350 million years ago, corals vanished in a dramatic extinction event, likely triggered by violent sea-level swings and a precipitous atmospheric carbon dioxide collapse. Hold this extraordinary fossil and embrace the untamed story of life's most daring ventures and devastating defeats.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50782147903768,"sku":"05OTT336","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3080_8472e452-26fd-456f-a34f-bbd8d99c8319.jpg?v=1760723445"},{"product_id":"3-1-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott337","title":"3.1\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.3 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.1 Inches Long, 1.4 Inches Wide, 1.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003c\/span\u003e\u003c\/strong\u003eBeginning around 410 million years ago, the Devonian period saw \u003cspan style=\"color: rgb(167, 86, 4);\"\u003e\u003cstrong\u003ecorals \u003c\/strong\u003e\u003c\/span\u003emake a triumphant comeback, establishing the world's first expansive reef communities. These ancient reefs flourished with stromatoporoids—remarkable sponge-like organisms that built reef structures—paired with tabulate corals forming diverse shapes from mounds to branching formations, rugose corals with their characteristic horn-like appearance, and primitive coralline algae species that adorned rock surfaces with multiple colors. Toward the Devonian's end, the first stony corals emerged—the very ancestors of the vibrant reefs we know today. Regrettably, this coral renaissance proved temporary. By 350 million years ago, corals had vanished from the geological record entirely. Though scientists continue investigating the precise cause, evidence points to significant ocean level fluctuations and a dramatic reduction in atmospheric carbon dioxide as the likely culprits behind this sudden coral extinction.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50782160126232,"sku":"05OTT337","price":26.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3088_88bebd7b-6975-4af9-a11a-8e5ee3b59e81.jpg?v=1760723362"},{"product_id":"2-8-thamnopora-sp-coral-fossil-coral-reef-devonian-age-verde-valley-arizona-05ott340","title":"2.8\" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona","description":"\u003cp\u003eLocation: Martin Formation, Verde Valley, Arizona, United States\u003c\/p\u003e\n\u003cp\u003eWeight: 2.4 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.8 Inches Long, 2.2 Inches Wide, 1 Inch Thick\u003c\/p\u003e\n\u003cp\u003eDevonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eThamnopora SP Fossil Coral\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003c\/span\u003e\u003c\/strong\u003eThe Devonian period, roughly 410 million years ago, witnessed an exciting return of \u003cspan style=\"color: rgb(186, 98, 11);\"\u003e\u003cstrong\u003ecoral \u003c\/strong\u003e\u003c\/span\u003elife and the birth of Earth's first major reef ecosystems. These pioneering reefs brought together a fascinating community: stromatoporoids—sponge-like reef builders—working alongside tabulate corals that grew into mounds and branches, horn-shaped rugose corals, and early coralline algae that painted rocks in vibrant colors. As the Devonian drew to a close, the ancestors of today's stony corals made their first appearance, setting the stage for modern reef systems. Yet this thriving coral world didn't last. Around 350 million years ago, corals mysteriously vanished from the fossil record. While the exact reason remains uncertain, evidence suggests that dramatic shifts in ocean levels combined with a sharp decline in atmospheric carbon dioxide may have triggered this remarkable disappearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"The Crystal Miner 2025","offers":[{"title":"Default Title","offer_id":50782189453592,"sku":"05OTT340","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A3114_6f770a8b-4e4b-4427-8c37-d7e5949cfd05.jpg?v=1760723364"},{"product_id":"3-1-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm83","title":"3.1\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3.1 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.1 Inches Long, 2.5 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"249\" data-end=\"706\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eis an extinct genus of colonial rugose corals that thrived in warm, shallow seas during the Devonian Period, approximately 350 million years ago. These corals formed large, interconnected colonies made up of tightly packed, hexagonal corallites. Each corallite contains a central columella surrounded by radiating septae, creating the distinctive honeycomb or flower-like pattern that makes Hexagonaria fossils instantly recognizable.\u003c\/p\u003e\n\u003cp data-start=\"708\" data-end=\"1357\"\u003eSpecimens are found in several important fossil localities, including the Sahara Desert of Morocco (Assa Zag region) and the Great Lakes region of North America. In Michigan, the species Hexagonaria percarinata is famously known as the Petoskey stone and is designated as the official state stone. When cut and polished, these fossils reveal beautiful geometric patterns in shades of cream, gray, tan, and brown, making them highly sought after for lapidary work, jewelry, and decorative displays. Beyond their aesthetic appeal, Hexagonaria fossils provide valuable insight into Devonian reef ecosystems and the evolution of early coral communities.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533648494872,"sku":"06YMM83","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2235_16cd8401-e836-45c3-b51e-88533bb5f982.jpg?v=1767888980"},{"product_id":"2-4-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm86","title":"2.4\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 1.6 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.4 Inches Long, 1.4 Inches Wide, 0.9 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"2463\" data-end=\"2948\"\u003eDuring the Devonian Period, shallow tropical seas supported extensive coral reef systems dominated by rugose corals such as Hexagonaria. This genus formed large colonial structures composed of tightly packed, polygonal corallites, most commonly hexagonal in shape. Each corallite contains a central columella with radiating septae, creating a complex skeletal architecture that reflects both the growth pattern of the colony and the biological structure of the individual coral polyps.\u003c\/p\u003e\n\u003cp data-start=\"2950\" data-end=\"3419\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003efossils are well documented from Devonian deposits in both North Africa and North America. The Assa Zag region of Morocco is a notable source, while in the United States, Michigan’s Devonian limestones yield the iconic Petoskey stones. Polished specimens expose the internal coral anatomy in striking geometric detail, allowing scientists and collectors alike to study coral morphology while appreciating the aesthetic beauty of these ancient reef builders.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533704659224,"sku":"06YMM86","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2259_b4519a17-2d94-4225-96d8-b62f2f985a6e.jpg?v=1767888996"},{"product_id":"2-4-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm88","title":"2.4\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 2.1 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.4 Inches Long, 2.5 Inches Wide, 0.6 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"4362\" data-end=\"4802\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eis an extinct genus of colonial rugose coral that lived in warm, shallow seas during the Devonian Period, approximately 350 million years ago. These corals formed large colonies made up of tightly packed, hexagonal corallites. Each corallite contains a central columella and radiating septae, producing the characteristic honeycomb and flower-like patterns that have made Hexagonaria fossils highly recognizable and collectible.\u003c\/p\u003e\n\u003cp data-start=\"4804\" data-end=\"5440\"\u003eImportant fossil localities include the Assa Zag region of the Sahara Desert in Morocco and Devonian limestone deposits in Michigan, USA. In Michigan, the species Hexagonaria percarinata is commonly known as the Petoskey stone and is designated as the official state stone. When polished, Hexagonaria coral reveals striking geometric patterns and natural earth tones ranging from cream and gray to rich browns and tans. These fossils are widely used in lapidary art, jewelry making, and decorative objects, while also serving as valuable scientific specimens that provide insight into Devonian reef ecosystems and early coral evolution.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533706166552,"sku":"06YMM88","price":19.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2277_f2d64e2c-2b0a-4d12-b577-cec936d25d9f.jpg?v=1767888923"},{"product_id":"2-6-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm89","title":"2.6\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3.1 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.6 Inches Long, 2.3 Inches Wide, 0.8 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"258\" data-end=\"721\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eis an extinct colonial coral that flourished in Devonian oceans more than 350 million years ago, when vast shallow seas covered much of what is now North America and North Africa. This rugose coral formed massive colonies made up of tightly interlocking, polygonal chambers. These chambers, most commonly hexagonal, contain a central skeletal core and radiating internal walls that create the signature honeycomb appearance visible on fossil surfaces.\u003c\/p\u003e\n\u003cp data-start=\"723\" data-end=\"1243\"\u003eNotable fossil deposits occur in the Assa Zag region of the Moroccan Sahara and in the limestone formations of Michigan, USA. In Michigan, Hexagonaria percarinata is famously known as the Petoskey stone and has become a symbol of the state’s geological heritage. When polished, these fossils reveal beautifully defined floral and geometric patterns in soft creams, tans, grays, and deep, earthy browns. These striking natural designs make Hexagonaria a favorite for collectors, lapidary artists, and educational displays.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533706494232,"sku":"06YMM89","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2285_56945910-0dc6-4921-a27b-ceb5c01deec4.jpg?v=1767889163"},{"product_id":"2-9-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm92","title":"2.9\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 2.5 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.9 Inches Long, 2.1 Inches Wide, 0.7 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"2339\" data-end=\"2762\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003efossil coral represents a stunning relic of Devonian seas, preserved for more than 350 million years. This extinct rugose coral formed large, tightly packed colonies, with each coral chamber shaped in a distinctive hexagonal pattern. The result is a naturally repeating design that resembles flowers or honeycomb cells, making Hexagonaria one of the most visually striking fossil corals available to collectors.\u003c\/p\u003e\n\u003cp data-start=\"2764\" data-end=\"3240\"\u003eSpecimens from Morocco’s Sahara Desert and from Michigan’s Devonian deposits are especially prized. In Michigan, Hexagonaria percarinata is known as the Petoskey stone and is celebrated as the state stone. When expertly polished, these fossils display bold geometric patterns in soft creams, tans, and rich browns. Each piece is unique, making Hexagonaria coral highly desirable for jewelry, display pieces, and fossil collections that value both beauty and deep-time history.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533714686232,"sku":"06YMM92","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2309_0b57704a-e076-4b0d-b11b-2c441bd8dc3e.jpg?v=1767889092"},{"product_id":"2-6-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm93","title":"2.6\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.6 Inches Long, 2.5 Inches Wide, 0.8 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"3298\" data-end=\"3713\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eis an extinct genus of colonial rugose coral that lived in warm, shallow seas during the Devonian Period, around 350 million years ago. Its colonies were composed of numerous tightly packed, hexagonal skeletal cups, each with a central structure and radiating septae. This complex architecture creates the signature honeycomb and floral patterns that become especially vivid when the fossil is polished.\u003c\/p\u003e\n\u003cp data-start=\"3715\" data-end=\"4224\"\u003eThese fossils are best known from two major regions: the Sahara Desert of Morocco and the Great Lakes region of the United States. In Michigan, Hexagonaria percarinata is referred to as the Petoskey stone and holds official state stone status. Polished Hexagonaria reveals a wide range of natural earth tones, making it popular for use in lapidary art, home décor, and educational displays. At the same time, these fossils offer valuable insight into Devonian coral reef systems and early marine biodiversity.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533737820440,"sku":"06YMM93","price":21.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2317_7d0f5935-40a5-4e7d-adce-4ad1f0dfc30a.jpg?v=1767889041"},{"product_id":"2-6-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm94","title":"2.6\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3.2 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.6 Inches Long, 1.7 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"4285\" data-end=\"4721\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003efossil coral is a classic example of Devonian marine life preserved in stone. Living approximately 350 million years ago, this extinct colonial rugose coral formed extensive reef-like colonies in warm, shallow seas. Each colony consists of tightly arranged, hexagonal corallites, each containing a central columella and radiating septae that produce the iconic honeycomb and flower-like patterns associated with Hexagonaria.\u003c\/p\u003e\n\u003cp data-start=\"4723\" data-end=\"5306\"\u003eImportant sources include the Assa Zag region of the Moroccan Sahara and Devonian limestone formations in Michigan, USA. In Michigan, Hexagonaria percarinata is commonly known as the Petoskey stone and is designated as the official state stone. When polished, these fossils reveal intricate geometric patterns and rich natural coloration, ranging from soft creams and grays to deeper tans and browns. These visually striking fossils are prized by collectors, jewelers, and educators alike, offering both aesthetic beauty and a tangible connection to ancient Devonian reef ecosystems.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533743096088,"sku":"06YMM94","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2325_6ee0b883-e169-4664-9556-d57c6d3cd008.jpg?v=1767888904"},{"product_id":"2-6-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm95","title":"2.6\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 2.3 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.6 Inches Long, 2.2 Inches Wide, 0.7 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"248\" data-end=\"763\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eis an extinct genus of rugose coral that formed extensive colonies in Devonian seas more than 350 million years ago. At that time, much of what is now North America and North Africa was submerged beneath warm, shallow tropical waters. Hexagonaria colonies consisted of thousands of closely packed, polygonal coral cups, most commonly hexagonal in shape. Each cup contained a central skeletal pillar and radiating internal walls, creating the distinctive honeycomb patterns preserved in fossil specimens.\u003c\/p\u003e\n\u003cp data-start=\"765\" data-end=\"1285\"\u003eNotable fossil occurrences include the Assa Zag region of Morocco and Devonian limestone deposits of Michigan, USA. In Michigan, Hexagonaria percarinata is widely recognized as the Petoskey stone and has become an important symbol of the state’s geological history. When cut and polished, these fossils reveal beautifully defined floral patterns and natural earth tones, making them popular for lapidary art, educational displays, and decorative uses while also preserving critical evidence of ancient reef environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533748994328,"sku":"06YMM95","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2335_58230831-5574-4750-a38e-266540a71ce8.jpg?v=1767889219"},{"product_id":"2-7-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm97","title":"2.7\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 2.7 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.7 Inches Long, 2 Inches Wide, 0.5 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"1340\" data-end=\"1733\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003efossil coral showcases the complex growth patterns of ancient Devonian reef builders. This extinct colonial coral grew as large, interconnected colonies made up of tightly packed skeletal chambers. These chambers, often hexagonal, are arranged in repeating patterns, with each featuring a central structure and radiating septae that reflect the internal anatomy of the coral polyp.\u003c\/p\u003e\n\u003cp data-start=\"1735\" data-end=\"2259\"\u003eSpecimens are commonly recovered from fossil-rich regions in Morocco’s Sahara Desert and from Devonian-age limestone in Michigan. In Michigan, these fossils are known as Petoskey stones and are valued both scientifically and aesthetically. Polished Hexagonaria reveals bold geometric and floral designs, along with natural color variations that range from light cream to deep brown. These fossils offer a rare opportunity to observe coral colony architecture preserved in remarkable detail for hundreds of millions of years.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533753418008,"sku":"06YMM97","price":22.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2339_40a360af-f21a-4eeb-a50a-0b094e4a8fac.jpg?v=1767889274"},{"product_id":"2-7-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm98","title":"2.7\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3.5 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.7 Inches Long, 2.3 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"2316\" data-end=\"2735\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003ecoral fossils are among the most visually distinctive fossil corals available to collectors. Formed during the Devonian Period, these ancient corals developed tightly interlocking, hexagonal skeletal cups that create natural flower-like and honeycomb designs across the fossil surface. These patterns become especially dramatic when the fossil is polished, revealing the coral’s internal skeletal structure.\u003c\/p\u003e\n\u003cp data-start=\"2737\" data-end=\"3216\"\u003eImportant sources include the Assa Zag region of the Moroccan Sahara and the Great Lakes region of the United States. In Michigan, Hexagonaria percarinata is known as the Petoskey stone and is designated as the official state stone. Polished pieces display warm, earthy tones and intricate geometric patterns, making them highly desirable for jewelry, decorative objects, and fossil displays. Each specimen is naturally unique, ensuring that no two pieces share the same pattern.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533757776152,"sku":"06YMM98","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2347_6cdb898a-80c1-4c89-9a25-27c287825f9e.jpg?v=1767888887"},{"product_id":"2-2-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm96","title":"2.2\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.2 Inches Long, 1.7 Inches Wide, 1.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"3262\" data-end=\"3700\"\u003eDuring the Devonian Period, coral reefs were dominated by rugose and tabulate corals, with \u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eplaying a significant role in reef formation. This colonial coral formed large, rigid skeletal structures that contributed to the framework of ancient reef systems. Each colony was composed of tightly packed, hexagonal corallites, complete with central skeletal pillars and radiating septae, forming the signature honeycomb appearance.\u003c\/p\u003e\n\u003cp data-start=\"3702\" data-end=\"4098\"\u003eHexagonaria fossils are found in Devonian deposits of Morocco and Michigan, where they are famously known as Petoskey stones. When polished, the fossils reveal striking internal patterns and natural color variations. These specimens provide valuable insight into Devonian reef ecology while also serving as beautiful natural objects used in lapidary work, home décor, and educational collections.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533798834456,"sku":"06YMM96","price":19.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2358_e7e1db1e-e694-432a-bd46-eed65a3fbede.jpg?v=1767888883"},{"product_id":"2-6-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm99","title":"2.6\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3.6 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 2.6 Inches Long, 2.2 Inches Wide, 1.3 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"4152\" data-end=\"4652\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003efossil coral represents a classic example of Devonian marine life preserved in exceptional detail. Living more than 350 million years ago, this extinct rugose coral formed large colonial structures in warm, shallow seas. The colonies consist of tightly packed, hexagonal corallites, each featuring a central columella and radiating septae. This skeletal architecture produces the iconic honeycomb and floral patterns that have made Hexagonaria fossils highly recognizable and collectible.\u003c\/p\u003e\n\u003cp data-start=\"4654\" data-end=\"5225\"\u003eSignificant fossil sources include the Assa Zag region of the Sahara Desert in Morocco and Devonian limestone formations in Michigan, USA. In Michigan, Hexagonaria percarinata is known as the Petoskey stone and is celebrated as the official state stone. When polished, Hexagonaria coral reveals intricate geometric designs and rich natural coloration, ranging from soft creams and grays to deep tans and browns. These fossils are prized by collectors, jewelers, and educators for both their aesthetic beauty and their importance in understanding Devonian reef ecosystems.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533835731224,"sku":"06YMM99","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2362_d6d987c9-bdb3-4b1a-9712-a2dfd682c0fb.jpg?v=1767889054"},{"product_id":"3-1-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm101","title":"3.1\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 3.2 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.1 Inches Long, 1.7 Inches Wide, 0.7 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"268\" data-end=\"710\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003eis an extinct genus of colonial rugose coral that thrived in Earth’s oceans during the Devonian Period, more than 350 million years ago. At that time, vast shallow seas covered large portions of what are now North America and North Africa, creating ideal conditions for extensive coral reef development. Hexagonaria formed large, rigid colonies composed of countless tightly packed skeletal cups, most commonly hexagonal in shape.\u003c\/p\u003e\n\u003cp data-start=\"712\" data-end=\"1082\"\u003eEach corallite contains a central skeletal structure surrounded by radiating internal walls, producing the distinctive honeycomb and floral patterns that are characteristic of this genus. These repeating geometric designs reflect the biological organization of the coral colony and offer a rare opportunity to observe ancient coral anatomy preserved in stone.\u003c\/p\u003e\n\u003cp data-start=\"1084\" data-end=\"1722\"\u003eNotable fossil deposits occur in the Assa Zag region of the Moroccan Sahara and in Devonian limestone formations of Michigan, USA. In Michigan, the species Hexagonaria percarinata is widely known as the Petoskey stone and holds official state stone status. When cut and polished, Hexagonaria coral reveals intricate internal patterns and warm natural colors, ranging from pale creams and soft grays to deeper tans and browns. These fossils are prized for lapidary work, jewelry, educational collections, and decorative displays, while also serving as important scientific records of Devonian reef ecosystems and early marine biodiversity.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533910704408,"sku":"06YMM101","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2378_da69730e-283a-4cc8-b7db-7fcb4c512b75.jpg?v=1767888957"},{"product_id":"1-9-polished-hexagonaria-coral-fossil-devonian-age-350-million-yrs-old-morocco-06ymm102","title":"1.9\" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco","description":"\u003cp\u003eLocation: Assa Zag Region, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: 1.6 Ounces   \u003c\/p\u003e\n\u003cp\u003eDimensions: 1.9 Inches Long, 1.8 Inches Wide, 0.7 Inches Thick \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDevonian Age, 350 million years old\u003c\/p\u003e\n\u003chr\u003e\n\u003cp data-start=\"197\" data-end=\"628\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eHexagonaria \u003c\/strong\u003e\u003c\/span\u003efossil coral offers a striking glimpse into ancient Devonian seas, preserved for more than 350 million years within limestone deposits. This extinct colonial rugose coral grew as large, interconnected colonies made up of tightly arranged, geometric skeletal chambers. These chambers, most often hexagonal, create naturally repeating patterns that resemble flowers, honeycombs, or mosaic tiles across the fossil surface.\u003c\/p\u003e\n\u003cp data-start=\"630\" data-end=\"1007\"\u003eAt the center of each chamber is a skeletal core surrounded by radiating internal walls, forming the complex internal structure that becomes especially visible when the fossil is polished. This intricate architecture reflects how thousands of individual coral polyps once lived together as a single colony, building massive reef frameworks in warm, shallow marine environments.\u003c\/p\u003e\n\u003cp data-start=\"1009\" data-end=\"1594\"\u003eWell-known sources for Hexagonaria include the Assa Zag region of the Moroccan Sahara and Devonian limestone deposits in Michigan, USA. In Michigan, Hexagonaria percarinata is known as the Petoskey stone and is celebrated as the state stone. Polished specimens display elegant natural color variations, from soft creams and light grays to rich tans and deep browns, making them highly desirable for decorative pieces, jewelry, and fossil collections. Beyond their visual appeal, these fossils serve as important records of ancient reef ecosystems and the diversity of early coral life.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"CoralM25","offers":[{"title":"Default Title","offer_id":51533911621912,"sku":"06YMM102","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A2386_6c1ce002-cea6-4e82-b70c-36e9e360c538.jpg?v=1767888909"},{"product_id":"4-3-colonial-rugose-coral-fossil-devonian-age-speed-quarry-clark-county-indiana-06all482-colonial-rugose-coral-fossil-devonian-age-speed-quarry-clark-county-indiana","title":"4.3\" Colonial Rugose Coral Fossil Devonian Age Speed Quarry, Clark County, Indiana","description":"\u003cp\u003eLocation: Speed Quarry, Clark County, Indiana\u003c\/p\u003e\n\u003cp\u003eWeight: 3.4 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 4.3 Inches Long, 2.7 Inches Wide, 1.1 Inches Thick \u003c\/p\u003e\n\u003cp\u003eMiddle Devonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eColonial Rugose Fossil Coral (Prismatophyllum Prisma)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eDare to own a relic from one of nature's boldest experiments in reef formation. During the Devonian period—410 million years ago—\u003cstrong\u003e\u003cspan style=\"color: rgb(169, 91, 13);\"\u003ecorals \u003c\/span\u003e\u003c\/strong\u003eentered the oceans with remarkable force, creating Earth's first large reef systems. These pioneering underwater organisms included stromatoporoids that built reef bases, tabulate corals with branching, sculptural growth, rugose corals with horn-like shapes, and brightly colored coralline algae ancestors that painted ancient seabeds. As the period progressed, scleractinian corals appeared—today's main reef builders. However, ambition brought disaster. Around 350 million years ago, corals disappeared in a major extinction event, probably caused by extreme sea-level changes and a sudden drop in atmospheric carbon dioxide. Hold this remarkable fossil and reflect on the wild story of life's boldest efforts and greatest losses.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg height=\"424\" width=\"613\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"AlanG26","offers":[{"title":"Default Title","offer_id":52013885456664,"sku":"06ALL482","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A7478_c3b6288f-5cee-4747-a15f-ebd73e497687.jpg?v=1777504547"},{"product_id":"3-2-colonial-rugose-coral-fossil-devonian-age-speed-quarry-clark-county-indiana-06all483","title":"3.2\" Colonial Rugose Coral Fossil Devonian Age Speed Quarry, Clark County, Indiana","description":"\u003cp\u003eLocation: Speed Quarry, Clark County, Indiana\u003c\/p\u003e\n\u003cp\u003eWeight: 4.3 Ounces  \u003c\/p\u003e\n\u003cp\u003eDimensions: 3.2 Inches Long, 3.2 Inches Wide, 1.7 Inches Thick \u003c\/p\u003e\n\u003cp\u003eMiddle Devonian Age 380 Million Years Old\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #38761d;\"\u003eThe item pictured is the one you will receive.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #bb6e18;\"\u003e\u003cstrong\u003eColonial Rugose Fossil Coral (Prismatophyllum Prisma)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eDare to own a relic from one of nature's boldest experiments in reef formation. During the Devonian period—410 million years ago—\u003cstrong\u003e\u003cspan style=\"color: rgb(169, 91, 13);\"\u003ecorals \u003c\/span\u003e\u003c\/strong\u003eentered the oceans with remarkable force, creating Earth's first large reef systems. These pioneering underwater organisms included stromatoporoids that built reef bases, tabulate corals with branching, sculptural growth, rugose corals with horn-like shapes, and brightly colored coralline algae ancestors that painted ancient seabeds. As the period progressed, scleractinian corals appeared—today's main reef builders. However, ambition brought disaster. Around 350 million years ago, corals disappeared in a major extinction event, probably caused by extreme sea-level changes and a sudden drop in atmospheric carbon dioxide. Hold this remarkable fossil and reflect on the wild story of life's boldest efforts and greatest losses.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/Coral_reef_large.png?v=1486961583\" alt=\"\" width=\"613\" height=\"424\"\u003e\u003c\/p\u003e\n\u003chr\u003e","brand":"AlanG26","offers":[{"title":"Default Title","offer_id":52014400438552,"sku":"06ALL483","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1250\/0441\/files\/5U8A7487_c84ddd3a-fa5c-4b98-953b-0daf1974b22d.jpg?v=1777504645"}],"url":"https:\/\/www.fossilageminerals.com\/collections\/coral-fossil.oembed?page=5","provider":"Fossil Age Minerals","version":"1.0","type":"link"}