Black Spinel 15-20mm Double Drill Puff Hexagon - 8 Inch R1757 each specimen will vary in

each specimen will vary in size and shape

The crystal naturally forms with 18 facets

Brazilian Amazonite is an opaque blue-green to light green stone

This later combined with additional silica in the groundwater as well as the minerals that give Mookaite its distinctive colors

Black Spinel 15-20mm Double Drill Puff Hexagon - 8 Inch R1757 each specimen will vary inSpinel 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.