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30 November, 06:16

What could the hardness of a mineral be if it can be scratched by a cent coin?

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Answers (2)
  1. 30 November, 06:38
    0
    It can become any of these things, Gypsum, Calcite, Fluorite, or Apatite
  2. 30 November, 07:27
    0
    The hardness of a mineral can be 3 or less
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