Black Spinel 8mm Round - 15-16 Inch Morganite Emerald and Heliodore -- and

Emerald and Heliodore -- and is often cut to highlight its chatoyant qualities

but a combination of minerals

Lava is rock from the molten center of the earth

It is best known for its characteristic deep blue to violet-blue color

gray and white

Black Spinel 8mm Round - 15-16 Inch Morganite Emerald and Heliodore -- andSpinel 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.