COVELLINE

Noun

covelline (countable and uncountable, plural covellines)

(mineral) covellite

Source: Wiktionary

Co*vel"line (k-vl"ln), Co*vel"lite (-lt), n. Etym: [After Covelli, the discoverer.] (Min.)

Definition: A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper.

Source: Webster’s Unabridged Dictionary 1913 Edition

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