Look up: chalcocite

1. 
   Chalcocite
   Chalcocite is one of the most important copper ore minerals. It occurs primarily in enriched zones of sulphide deposits. It has the formulae Cu2S and a relative hardness of 3.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   chalcocite
   [n] - a heavy gray mineral that is an ore of copper
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. 
   Chalcocite
   Chal'co·cite noun [ Greek 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 .]
   Found on http://www.encyclo.co.uk/webster/C/51
   
   
4. 
   chalcocite
   copper glance noun a heavy grey mineral that is an ore of copper
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
5. 
   Chalcocite
   `Chalcocite`, copper(I) sulfide (Cu2S), is an important copper ore mineral. It is opaque, being colored dark-gray to black with a metallic luster. It has a hardness of 2ý - 3. It is a sulfide with an orthorhombic crystal system. Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins. However, most chalcocite occurs in the supergene enriched environment below the oxidation zone of copper deposits as a result of the leaching...
   Found on http://en.wikipedia.org/wiki/Chalcocite
   
   
6. 
   Chalcocite
   • (n.) Native copper sulphide, called also copper glance, and vitreous copper; a mineral of a black color and metallic luster.
   Found on http://thinkexist.com/dictionary/meaning
   
   
7. 
   chalcocite
   sulfide mineral that is one of the most important ores of copper. Valuable occurrences include deposits of sulfide minerals at Ely, Nev., and ...
   Found on http://www.britannica.com/eb/a-z/c/51
   
   
8. 
   chalcocite
   chalcocite A gray to black brittle copper sulfide (Cu2S) that is an important ore of copper.
   Found on http://www.wordinfo.info/words/index/inf