Tri-Flow Obsidian Rough Chunk! Cretaceous but some of the material

but some of the material is just stunning

being approx 30 million years old

Weight: Approx 3 lbs 8

This stunning material has some awesome brecciation and coloration

and some are freeform cab-sized chunks

Tri-Flow Obsidian Rough Chunk! Cretaceous but some of the materialTri Flow Obsidian comes from Glass Butte Oregon, and is a gorgeous form of mahogany obsidian that often has multiple grains and currents of flow! Tri Flow can make some designer grade cabochons, as the obsidian between is often pure and almost completely see through when held to light or cut thin enough, and the waves of pattern are often in layers! The color generally comes from Magnetite that was present in the lava flow! Tri Flow Obsidian is