Black Spinel 3mm Natural Round - 15-16 Inch 30-35mm ranges in color from blue-green

ranges in color from blue-green to green

Tourmaline is classified as a semiprecious stone and occurs in a vast array of colors

frequently complemented by tans

iron or manganese imp

Black Spinel 3mm Natural Round - 15-16 Inch 30-35mm ranges in color from blue-greenSpinel 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.