Black Spinel 15-20mm Double Drill Puff Hexagon - 8 Inch Stone Type_Turquoise mustard yellow and cream tones

mustard yellow and cream tones and can be confused for Mookaite

a Venetian monk tipped molten copper into a vat of molten glass

South Africa in areas where gold was found

reds and grays

Black Spinel 15-20mm Double Drill Puff Hexagon - 8 Inch Stone Type_Turquoise mustard yellow and cream 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.