Black Onyx Raven Uruguay Onyx is a variety of

Onyx is a variety of chalcedony

Its Mohs hardness is 7

91 H inches

This piece is from the Congo and has been polished

These pieces are black and white onyx from Mexico that has been carved and polished into a raven

Black Onyx Raven Uruguay Onyx is a variety ofOnyx is a variety of chalcedony, an ultra small quartz crystalline mineral. Onyx is formed in layers if micro quartz and moganite, another quartz mineral. These pieces are black and white onyx from Mexico that has been carved and polished into a raven. You will receive one piece from our current stock. All are of similar size and quality. Average Dimensions: 1. 25 L x 0. 75 W x 1. 5 H inches. Average Weight: 0. 07 pounds