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which receive their color from trace amounts of chromium
or diameter of a bead
Each strand is unique
shape and size may vary
Black Spinel 4mm Faceted Coin - 15-16 Inch Stone Type_Australian Opal which receive their color fromSpinel 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.
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