chalcanthite

from WordNet (r) 3.0 (2006)
chalcanthite
    n 1: hydrated blue crystalline form of copper sulfate [syn:
         {blue vitriol}, {blue copperas}, {blue stone},
         {chalcanthite}]
from The Collaborative International Dictionary of English v.0.48
Chalcanthite \Chal*can"thite\, n. [L. chalcanthum a solution of
   blue vitriol, Gr. ?.] (Min.)
   Native blue vitriol. See {Blue vitriol}, under {Blue}.
   [1913 Webster]
antiflux / dictionary / chalcanthite
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