covellite

[koh-vel-ahyt, koh-vuh-lahyt]
noun
  1. a mineral, copper sulfide, CuS, indigo in color and usually occurring as a massive coating on other copper minerals.

Origin of covellite

1840–50; named after Nicolò Covelli (1790–1829), Italian mineralogist who found it; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for covellite

Historical Examples of covellite