Tri-Flow Obsidian Slab – Swirling Mahogany Pattern – Glass Butte Oregon Classic Beautiful slab of Tri-Flow Obsidian displaying the swirling patterns classic to this material from Glass Butte. This obsidian will be stunning once polished, as the polish will greatly enhance the flow patterns and reveal the beauty hidden beneath. The multiple flow lines and grain currents create mesmerizing designs that produce designer-grade cabochons. SPECIFICATIONS • Material: Natural Tri-Flow Obsidian • Dimensions: 152mm x 80mm x 7mm (Inches - 6.0" x 3.1" x 0.3") • Weight: 161 grams (5.68 oz) • Rarity: Uncommon • Origin: Glass Butte, Oregon, USA • Condition: Unpolished slab - ready for your project Tri-Flow Obsidian from Glass Butte, Oregon, is a mahogany obsidian variety featuring multiple flow patterns and grain currents that create mesmerizing designs. The obsidian between flow lines is often pure and nearly transparent when backlit or cut thin. Color comes from magnetite in the lava flow, giving it the characteristic mahogany appearance. This material is increasingly difficult to find, with most market slabs being old stock from earlier collecting. WHAT MAKES IT SPECIAL This piece showcases classic swirling flow patterns that will become dramatically more visible when polished. The magnetite-rich flows create natural artistry, while the increasing scarcity makes this Pacific Northwest material valuable for collectors. PERFECT FOR • Designer-grade cabochons • Oregon obsidian collectors • High-end jewelry making PHOTO NOTE: All photos wet to show polish potential, except last photo (dry) to examine natural flaws. Colors may vary on monitors. This listing is for the exact piece shown in photos.