Multi Spinel 3mm Banded Faceted Round - 15-16 Inch Stone Type_Coral is a calcium aluminium hydroxy

is a calcium aluminium hydroxy sorosilicate belonging to the epidote group of minerals

although the colors are much more muted

until the 17th century Crystal Quartz was believed to be permanently frozen water

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The mineral is named for the place where it is principally found

Multi Spinel 3mm Banded Faceted Round - 15-16 Inch Stone Type_Coral is a calcium aluminium hydroxySpinel 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.