Black Spinel 4mm Natural Round - 15-16 Inch Stone Type_Indigo Gabbro When this combination crystallized

When this combination crystallized

this stone

near the Kennedy Ranges of Australia

manganese and other metallic oxides captured during the forming of the rock

where copper contributes to blue tones and iron introduces green variations

Black Spinel 4mm Natural Round - 15-16 Inch Stone Type_Indigo Gabbro When this combination crystallizedSpinel 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.