Black Spinel 6mm Round - 15-16 Inch Color_Pink African Jade is a complex

African Jade is a complex Calcium Aluminum Silicate and is a Nephrite Jade

it is formed through the combination of carbonated water

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

this stone

pale green or copper red

Black Spinel 6mm Round - 15-16 Inch Color_Pink African Jade is a complexSpinel 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.