Black Spinel 4x6mm Faceted Rondelle - 15-16 Inch (dyed) Mookaite is a variety of

Mookaite is a variety of Jasper in colors of red

It forms when Quartz and Feldspar crystallize in radial aggregates within other silica-rich stones

including Diamond

Chrysoprase is a bright apple green

Naturally occurring in hues of blue-green to green with spots and streaks of red

Black Spinel 4x6mm Faceted Rondelle - 15-16 Inch (dyed) Mookaite is a variety ofSpinel 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.