Multi Spinel 2.5mm Table Cut Cube AA Grade - 15-16 Inch Calming A manganese carbonate material of

A manganese carbonate material of the Calcite group

West African Jade is a complex Calcium Aluminum Silicate and is a Nephrite Jade

Plated to prevent oxidization

Astrophyllite gets its name from the Greek words astron meaning "star" and phyllon meaning "leaf"

It is an aluminum borosilicate mixed with iron

Multi Spinel 2.5mm Table Cut Cube AA Grade - 15-16 Inch Calming A manganese carbonate material ofSpinel 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.