Occurs in Pinal County.
Chemical Formula: (Zn,Cu)3(SO4)(OH)4·4H2O
Specific Gravity: 3.21-3.36
Hardness: 2.5-3
Fraipontite is a hydrated zinc copper sulfate hydroxide mineral that often forms as blue to greenish-blue crystals or coatings. It is found in the oxidation zones of zinc-copper ore deposits.
Next Pinal County mineral: Freibergite