Occurs in Pinal County. Common in Arizona.
Chemical Formula: CuSO4•5H2O
Specific Gravity: 2.11-2.3
Hardness: 2.5-3
Chalcanthite is a blue copper sulfate mineral that commonly forms as crusts or powdery coatings on rocks in arid regions. It is a hydrated mineral containing water molecules.
Next Pinal County mineral: Chalcocite