38MM Polished Carnelian And Crystal Chalcedony Sphere Mineral Brazil Stand

Location: Brazil

Weight: 2.4 Ounces

Dimensions: 38MM

Comes with a Rosewood Stand.

The item pictured is the one you will receive. 

Carnelian, a cryptocrystalline variety of quartz, is a mineral renowned for its distinctive reddish-orange to brownish-red hues. Its color is primarily attributed to the presence of iron oxides, particularly hematite, which is finely dispersed within its silica structure The intensity and shade of the red can vary significantly, ranging from pale orange to deep, almost reddish-brown, depending on the concentration and distribution of these iron impuritiesHistorically, carnelian has been highly valued for its beauty and durability, making it a popular material for jewelry, seals, and ornamental objects across various ancient civilizations

Geologically, carnelian forms in a similar manner to other chalcedony varieties, typically as infillings in the amygdaloidal cavities of volcanic rocks or as nodules in sedimentary deposits. The formation process involves the precipitation of silica-rich solutions, often at relatively low temperatures and pressures. Over time, microscopic quartz crystals intergrow in a fibrous or radial pattern, forming the dense, microcrystalline structure characteristic of chalcedony. The iron oxides responsible for carnelian's color are incorporated during this crystallization process or through subsequent alteration. Heat treatment is a common practice to enhance or deepen the color of carnelian, as heating can further oxidize the iron impurities, intensifying the red tones. This practice has been employed for centuries, demonstrating an early understanding of the chemical reactions that influence the stone's appearance.