Black Spinel 4mm Natural Round - 15-16 Inch Stone Type_Indigo Gabbro Distinctive for its purple-and-gray tones

Distinctive for its purple-and-gray tones

this stone

Turquoise is one of the oldest known gemstones

where copper contributes to blue tones and iron introduces green variations

near the Kennedy Ranges of Australia

Black Spinel 4mm Natural Round - 15-16 Inch Stone Type_Indigo Gabbro Distinctive for its purple-and-gray tonesSpinel 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.