Covelline
Pronunciation : Co*vel"line (k-vl"ln), Co*vel"lite (-lt)
Part of Speech : n.
Etymology : [After Covelli, the discoverer.] (Min.)
Definition : Defn: A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper.
Source : Webster's Unabridged Dictionary, 1913