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What mineral is it if it's pearly, black, copper penny scratches it
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What mineral is it if it's pearly, black, copper penny scratches it
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Apr 8, 2021
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What mineral is it if it's pearly, black, copper penny scratches it
Chemistry
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Leigh Mathieson
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Gypsum and Talc I hope it will help
Jonathan Day
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Apr 14, 2021
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