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chalcocite

Syllabification: chal·co·cite
Pronunciation: /ˈkalkəˌsīt
 
/

Definition of chalcocite in English:

noun

Cuprous sulfide, an ore of copper, usually occurring as black, fine-grained masses.
Example sentences
  • Numerous fissure veins and fracture planes were present that contained brittle arsenical copper and chalcocite.
  • We have seen sooty black material associated with native copper from the Eagle mine that is almost certainly chalcocite.
  • At the Kingston mine, calcite occurred as thin massive veins cutting the lode and as modified rhombohedral crystals to 7 mm with inclusions of cuprite and chalcocite.

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