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This polished piece of Rainbow Obsidian has a flat base and beveled edge, and is polished over a curve on top. In regular lighting, the piece appears to be almost solid black. In bright natural light it displays a lighter olive green color with concentric bands.
4.75" x 3"
4.2oz
Obsidian is an organically created glass, formed through felsic lava that rapidly cools after exploding past the earth’s crust. It exhibits conchoidal fracturing and is a hardness of 5 to 5.5 on the Mohs scale. Typical Obsidian is a semi-translucent black that can have slight tints of green or brown, but Rainbow Obsidian has inclusions of hedenbergite that create greens, blues, and purples in the light.