Black Spinel 4mm Faceted Round - 15-16 Inch Namibia Moss Agate is a variety

Moss Agate is a variety of Chalcedony

depositing layer upon layer of Quartz silicate to create the banding and patterns now prized in Botswana Agate

Madre de Cacao is a very hard tropical wood with a visible grain

among other numerous names

Dalmation Jasper is the trade name for Dalmation Stone

Black Spinel 4mm Faceted Round - 15-16 Inch Namibia Moss Agate is a varietySpinel 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.