Occurs in Pinal County.
Chemical Formula: Fe2(SO4)3·9H2O
Specific Gravity: 1.95-2.02
Hardness: 2.5
Coquimbite is a hydrated iron sulfate mineral that often forms as yellow, brown, or reddish-brown crystalline masses. It is found in arid regions as an evaporite mineral.
Next Pinal County mineral: Cordierite