Black Spinel 3mm Faceted Round - 15-16 Inch february_jasper Rainbow Obsidian earned its name

Rainbow Obsidian earned its name from the chatoyant

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

but it is opaque as well

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

Each stone is unique in terms of its patterns

Black Spinel 3mm Faceted Round - 15-16 Inch february_jasper Rainbow Obsidian earned its nameSpinel 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.