Occurs in Pinal County.
Chemical Formula: Fe2+Fe3+4(SO4)6(OH)2·20H2O
Specific Gravity: 2.1-2.2
Copiapite is a hydrated iron sulfate mineral that often forms yellow powdery coatings or crusts. It is typically found in arid regions and is an alteration product of iron-bearing minerals. Next Pinal County mineral: Copper