Black Spinel 5mm Round - 15-16 Inch 8-Inch Strands Jade has been used for

Jade has been used for tens of thousands of years

With the possible exception of the horizon meeting the bright blue sky on a perfect summer day

yellow and white

but differ in chemical composition

The stone was discovered by George D

Black Spinel 5mm Round - 15-16 Inch 8-Inch Strands Jade has been used 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.