Black Spinel 8mm Round - 15-16 Inch Shape_Flat Oval Azurite often occurs with green

Azurite often occurs with green Malachite

It is a variety of banded Chalcedony with layers that may contain scarlet

” owing to its red appearance when sliced thinly or powdered

In lower grades it can be transparent to opaque and is commonly light blue

Azurite is a Copper carbonate mineral that forms in masses

Black Spinel 8mm Round - 15-16 Inch Shape_Flat Oval Azurite often occurs with greenSpinel 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.