Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch 4mm Light Blue ” It is chemically identical

” It is chemically identical to Granite

Use the Nylon Jaw Pliers for flattening and hardening designs after shaping

It is a rare variety of Pectolite

the Sun Stone

or in the vesicles and intergranular spaces of rhyolite

Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch 4mm Light Blue ” It is chemically identicalSpinel 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.