Black Spinel 3mm Table Cut Cube A Grade Bead - 15-16 Inch Shape_Tube The green coloring has likened

The green coloring has likened the stone of jadeite in the past

Iron gives them blue

Through this process

and was named Morganite in honor of John Pierpoint Morgan

with small

Black Spinel 3mm Table Cut Cube A Grade Bead - 15-16 Inch Shape_Tube The green coloring has likenedSpinel 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.