Occurs in Pinal County.
Chemical Formula: ZnMn2+2O4
Specific Gravity: 4.1-4.3
Luster: Submetallic
Hardness: 4.5-5.5
Hetaerolite is a zinc manganese oxide mineral that often appears as black metallic crystals or masses. It is found in oxidized zinc ore deposits.
Next Pinal County mineral: Hexahydrite