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Famous malachite mines in the Ural mountains of Russia once produced 20-ton blocks of the stone
The presence of Manganese within the stone produces the purple hue
It is not a mineral
It is often thought of as an all to black stone
Black Spinel 5mm Round - 15-16 Inch Picture Jasper Famous malachite mines in theSpinel 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.
