Black Spinel 8mm Faceted Round - 15-16 Inch featured_04252024 Its inclusions of golden tones

Its inclusions of golden tones to rust to red are due to traces of hematite embedded in the stone

piñon Cubano

aluminum oxide and other metal oxides

Dutch Colonel Hendrik Von Prehn

Through this process

Black Spinel 8mm Faceted Round - 15-16 Inch featured_04252024 Its inclusions of golden 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.