
Amethyst
Mineral, quartz variety

Mineral, quartz variety
Amethyst is a violet variety of natural quartz. Ancient Greeks wore amethyst and carved drinking vessels from it in the belief that it would prevent intoxication. Amethyst, a semiprecious stone, is often used in jewelry. It occurs mostly in association with calcite, quartz, smoky quartz, hematite, pyrite, fluorite, goethite, agate, and chalcedony.
Read on Wikipedia · Image Gonzalo Devia, CC BY-SA 4.0
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