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obsidian, igneous rock occurring as a natural glass formed by the rapid cooling of viscous lava from volcanoes. Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite.
CONDITION: New
COLOR: As pictured
SHAPE: As shown
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Natural Rainbow-Obsidian Adjustable Ring, Bohemian 925 Sterling Silver Gemstone Ring Jewelry,
$10.00