Obsidian Skull Calcite Opalite is a man-made from

Opalite is a man-made from glass and natural additives such as dolomite

Onyx is formed in layers if micro-quartz and moganite

DImensions: 3

Dimensions: 3

Dimensions: 6

Obsidian Skull Calcite Opalite is a man-made fromObsidian is a naturally occurring volcanic glass, an extrusive igneous rock, formed when volcanic lava rich in silica cools rapidly and forms without the formation of crystals. These pieces are polished into a skull shape. You will receive one piece selected from our current stock. All pieces are of similar size and quality. Average Dimensions: 2. 0 L x 1. 25 W x 1. 5 H inches Average Weight: 3. 8 ounces