Black Spinel 4mm Natural Round - 15-16 Inch 1207202148HR and can display a nearly

and can display a nearly emerald green color due to the presence of Chromium within the stone

This semi to translucent stone occurs in an array of hues

known as "azure

Carnelian is a glassy

Black Spinel 4mm Natural Round - 15-16 Inch 1207202148HR and can display a nearlySpinel 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.