Black Spinel 15mm Pinwheel - 8 Inch Stone Type_Beryl It is highly regarded for

It is highly regarded for its beautiful blue color flecked with gold inclusions of pyrite

Its bright green coloration is due to traces of chromium

Peter the Great set up Russia's first spa in Karelia to make use of the water purifying properties of shungite

Pietersite is composed of

Black Spinel 15mm Pinwheel - 8 Inch Stone Type_Beryl It is highly regarded forSpinel is a hard vitreous magnesium aluminum oxide, and comes in a range of other colors, but those varieties are transparent. Black Spinel not only has the dark color, but it is opaque as well, rendering its black especially deep and mysterious. Sometimes called the "Black Prince's Ruby" for its role in the English crown. It has been mistaken for ruby and sapphire at times, but can be distinguished by its structure and its lower relative hardness.