Collections
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Dinosaur Collection (668)
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Fossil Collection (1879)
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Mammal Collection (202)
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Mineral Collection (636)
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Teeth Fossil Collection (617)
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Dinosaur Fossils
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Minerals
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- Crystals Quartz (80)
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- Gabbro Minerals (10)
- Galena Minerals (19)
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Sardonyx Mineral
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Sardonyx is a variety of chalcedony, which is a microcrystalline form of quartz. It is characterized by its banded appearance, typically featuring layers of different colors, including green, white, and sometimes shades of brown or red. The term "sardonyx" itself derives from the Greek words "sard," referring to a reddish stone, and "onyx," meaning fingernail or claw, which reflects the stone's layered structure
Sardonyx has been valued since antiquity for its beauty and supposed protective properties. In ancient Rome and Greece, it was often used in intaglio carvings for seals and cameos. The green variety specifically was believed to bring good fortune and enhance communication skills. It was also associated with various deities in different cultures, symbolizing strength and stability
The physical properties of green sardonyx include a hardness of 6.5 to 7 on the Mohs scale, making it relatively durable for use in jewelry. Its specific gravity ranges from 2.58 to 2.64, which is typical for quartz varieties. The stone exhibits a vitreous luster when polished and can be translucent to opaque depending on the thickness of the bands.
