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Mineral Of The Day #86: Chalcotrichite

Mohs Hardness Scale: 3.5-4
Category: oxide mineral
Formula: Cu2O

Fun Facts:

  • Chalcotrichite is a variety of cuprite consisting of thin fibrous sprays or mats of hair-like crystals.
  • Its name comes from the Greek meaning “hairy copper.”
  • It is popular as a mineral specimen.
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