chalcocite

From Ancient Greek χαλκός (khalkós) +‎ -ite.

• IPA^(key): /ˈkæl.kəˌsaɪt/

chalcocite (countable and uncountable, plural chalcocites)

1. (mineralogy) Cuprous sulfide, Cu₂S, an important ore of copper.

   Synonyms: chalcosine, copper-glance, redruthite

   • 1905, Waldemar Lindgren, The Copper Deposits of the Clifton-Morenci District, Arizona, page 207:

     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.

• David Barthelmy (1997–2026), “Chalcocite”, in Webmineral Mineralogy Database.
• “chalcocite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.

• catecholic