Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch Carved The color of Smoky Quartz

The color of Smoky Quartz is due to natural irradiation and traces of aluminum within the crystal lattice of the stone

bright red

Sapphires sustain life force and attract peace and joy

A cryptocrystalline Chalcedony

brown to golden-yellow hydrous potassium iron titanium silicate mineral

Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch Carved The color of Smoky QuartzSpinel 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.