✨ Rare Oregon Fire Obsidian Cabochon Preform – Glass Butte Material ✨
Offered here is a 31 carat natural Fire Obsidian cabochon preform from the famous Glass Butte deposit in Oregon, one of the only locations in the world known for true fire obsidian.
This piece displays beautiful layered golden fire banding that shifts with movement and light. The surface is shaped and stabilized as a cab preform and just needs a final polish to fully awaken the fire.
A wonderful opportunity for lapidary artists, collectors, or anyone building a high-end Oregon obsidian collection.
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Stone Details
Stone: Natural Fire Obsidian
Weight: 31 carats
Size: approx. 19 x 33 mm
Origin: Glass Butte, Oregon, USA
Finish: Cabochon preform (needs final polish)
Treatment: None
Type: Natural volcanic glass with fire layering
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About Fire Obsidian
Fire Obsidian forms when thin layers of magnetite platelets align inside volcanic glass, creating the rare optical “fire” effect seen as shimmering gold, copper, and sometimes rainbow flashes beneath the surface.
Material from Glass Butte is especially sought after by lapidaries because quality fire layers are increasingly difficult to source.
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Why This Piece Stands Out
Strong directional gold fire banding
Classic Glass Butte structure
Excellent cabochon proportions
Ready for final polish
Collector-grade Oregon material
One-of-a-kind natural gemstone
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This is the exact stone you will receive. Photographed under direct light to reveal the internal fire structure.
From my personal lapidary selection at GemRockz, where I specialize in rare American cutting material.