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A heavy gray mineral that is an ore of copper
Answer for the clue "A heavy gray mineral that is an ore of copper ", 10 letters:
chalcocite
Word definitions for chalcocite in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Chalcocite \Chal"co*cite\, n. [Gr. chalko`s brass.] (Min.) Native copper sulphide, called also copper glance , and vitreous copper ; a mineral of a black color and metallic luster. [Formerly written chalcosine .]
Wiktionary
Word definitions in Wiktionary
n. (context mineral English) cuprous sulfide, copper 2 sulfur, an important ore of copper.
Wikipedia
Word definitions in Wikipedia
Chalcocite , copper(I) sulfide (CuS), is an important copper ore mineral. It is opaque and dark-gray to black with a metallic luster . It has a hardness of 2½ - 3 on the Mohs scale . It is a sulfide with an orthorhombic crystal system. The term chalcocite ...
WordNet
Word definitions in WordNet
n. a heavy gray mineral that is an ore of copper [syn: copper glance ]
Usage examples of chalcocite.
These creatures wandered the Great Escarpment in loose caravans, seeking the diffuse surface areas of stratiform copper deposits, preferably those with high amounts of tetrahedrite or chalcocite in them, so that they could recover silver as a byproduct of the copper.