Shungite 20mm Coin - 15-16 Inch R1753 white and occasionally gray or

white and occasionally gray or brown

manganese and other metallic oxides captured during the forming of the rock

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

This variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns

such as China

Shungite 20mm Coin - 15-16 Inch R1753 white and occasionally gray orShungite 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