Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch Carved brown to golden-yellow hydrous potassium

brown to golden-yellow hydrous potassium iron titanium silicate mineral

this semi to precious variety of quartz is found in many locations around the world

Turquoise is known for it's strength and protection attributes - dating back to ancient Egyptian amulets

Topaz is found in many locations worldwide where rocks like pegmatite and rhyolite are formed

Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch Carved brown to golden-yellow hydrous potassiumSpinel 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.