Chalcedony (Marbled) 16mm Puff Coin - 15-16 Inch Green Shungite has been used as

Shungite has been used as a folk medical treatment since the early 18th century

5 billion years ago

mother of pearl

but hypersthene contains a significant amount of both elements

fluorannite

Chalcedony (Marbled) 16mm Puff Coin - 15-16 Inch Green Shungite has been used asBlue Chalcedony is a naturally occurring soft blue translucent stone. It is a member of the Quartz family, a form of silica with a cryptocrystalline structure that incorporates Moganite along with the Quartz. Known in antiquity as the Speakers Stone, it is believed to have been worn Cicero, the great Roman orator. These strands were cut into beads with some of the material the Chalcedony was mined out of remaining, creating a unique "marbled" look.