Black Spinel 15mm Pinwheel - 8 Inch White Moonstone Jade refers to an ornamental

Jade refers to an ornamental mineral

Round Nose

but a combination of minerals

Famous malachite mines in the Ural mountains of Russia once produced 20 to ton blocks of the stone

The presence of Manganese in the stone produces its color

Black Spinel 15mm Pinwheel - 8 Inch White Moonstone Jade refers to an ornamentalSpinel 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.