Chalcocite

//ˈkæl.kəˌsaɪt// noun

Definitions

Noun
  1. 1
    Cuprous sulfide, Cu₂S, an important ore of copper. countable, uncountable

    "Their croppings are either entirely barren or contain only a moderate amount of copper, but much richer ore is ordinarily found just above the chalcocite zone."

  2. 2
    a heavy grey mineral that is an ore of copper wordnet

Etymology

From Ancient Greek χαλκός (khalkós) + -ite.

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