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geraldarmstrong48: Bismuth - Manmade (No. 2734-05122017)
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geraldarmstrong48: Chalcanthite - Manmade (No. 2735-05122017)
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geraldarmstrong48: Nickel - Manmade (No. 2731-05122017)
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geraldarmstrong48: Silicon Carbide - Manmade (No. 2736-05122017)