The Probert Encyclopaedia of Rocks & Minerals

CHALCANTHITE

Chalcanthite is native blue vitriol, a minor ore of copper found only in arid regions. It occurs near the surface in copper veins and is often deposited on iron from the water in copper mines. It is used in calico printing, insecticides and for industrial purposes. It has the formulae CuSO45H2O and a relative hardness of 3.
Research Chalcanthite