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covellite

[koh-vel-ahyt, koh-vuh-lahyt] /koʊˈvɛl aɪt, ˈkoʊ vəˌlaɪt/
noun
1.
a mineral, copper sulfide, CuS, indigo in color and usually occurring as a massive coating on other copper minerals.
Origin
1840-1850
1840-50; named after Nicolò Covelli (1790-1829), Italian mineralogist who found it; see -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for covellite
  • Other rocks from the contact zone show intense supergene effects such as clay alteration, covellite and iron-oxides.
Encyclopedia Article for covellite

a sulfide mineral that is a copper ore, cupric sulfide (CuS). It typically occurs as an alteration product of other copper sulfide minerals (chalcopyrites, chalcocite, and bornite) present in the same deposits, as at Leogang, Austria; Kawau Island, N.Z.; and Butte, Mont., U.S. Covellite forms crystals that belong to the hexagonal system. For detailed physical properties, see sulfide mineral (table)

Learn more about covellite with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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