Black Onyx Raven Uruguay It displays an opalescent Shiller

It displays an opalescent Shiller

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

These pieces are polished into a sphere

This piece is from the Congo and has been polished

Black Onyx Raven Uruguay It displays an opalescent ShillerOnyx 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