Tri-Flow Mahogany Obsidian Slab Lapidary Stone Slice Cut Rock

Tri-Flow Obsidian comes from Glass Butte, Oregon, 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 usually pure and almost completely see-through when held to light or cut thin enough, and the pattern waves are often in layers. The color generally comes from magnetite, which was present in the lava flow. Tri-Flow Obsidian is getting harder and harder to come by, with most of the slabs on the market being old stock. It takes an excellent shine.

Measurements (inches - longest - approx): 4.7 x 3.6 x .27

The last photo has been taken dry so that you may see any defects. The other images were taken wet to simulate polish.