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Raw Mica Schist, Metamorphic Rock Specimen - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms - Eisco Labs: Amazon.com: Industrial & Scientific
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File:Staurolite-garnet-mica schist (Mt. Rushmore quadrangle, Black Hills, South Dakota, USA) (27022880317).jpg - Wikimedia Commons
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