chalcanthite
chalcanthite
A triclinic mineral 2[CuSO4.5H2O]; azure blue; metallic taste; occurs in the oxidized supergene zone above copper sulfides in arid regions; a minor ore of copper.; copper sulfate; copper chalcanthite; copper vitriol; bluestone; cyanosite.
The mineral group chalcanthite, jokokuite, pentahydrite, and siderotil