Shungite 20mm Coin - 15-16 Inch Stone Type_Quartz a green-colored mineral

a green-colored mineral

Like all obsidian

The original stones were often used as protective amulets and are usually scarred or pitted in places where they were ground off for use in traditional medicines

Opals are hydrated amorphous forms of silica

It's defined by a bright green color

Shungite 20mm Coin - 15-16 Inch Stone Type_Quartz a green-colored mineralShungite 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