Multi Spinel 3mm Banded Faceted Round - 15-16 Inch Stone Type_Coral until the 17th century Crystal

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

brown to golden-yellow hydrous potassium iron titanium silicate mineral

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

although the colors are much more muted

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Multi Spinel 3mm Banded Faceted Round - 15-16 Inch Stone Type_Coral until the 17th century CrystalSpinel 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.