Shungite 10mm Round - 15-16 Inch Cacoxenite Amethyst this semi-precious variety of quartz

this semi-precious variety of quartz is found in many locations around the world

and it has been used throughout history for various purposes

and the green color is caused by a reaction in the stone when the chrome is introduced to water

During the Renaissance

sodalite and pyrite

Shungite 10mm Round - 15-16 Inch Cacoxenite Amethyst this semi-precious variety of quartzShungite is a black, lustrous, non crystalline mineraloid consisting of a high percentage of carbon. It was first found in a deposit near Shunga village, in Karelia, Russia, where it gets its name. Shungite has been used as a folk medical treatment since the early 18th century. Peter the Great set up Russia's first spa in Karelia to make use of the water purifying properties of shungite. The antibacterial properties of shungite have been confirmed by