Blue Stone Copper is the chemical compound having formula CuSO4. It exists as a series of compounds that are different in their degree of hydration. The anhydrous form is a pale green or gray-white powder, whereas the pentahydrate (CuSO4·5H2O), the most commonly encountered salt, is bright blue. Blue Stone Copper is tested on several parameters before dispatching from our unit to make sure that no compromise is done with its quality or purity. We offer this at highly cost- effective prices.