Occurs in Pinal County.
Chemical Formula: (Zn,Fe)Mn3+O(OH)6
Specific Gravity: 3.0-3.2
Hardness: 4-4.5
Chalcophanite is a manganese zinc oxide hydroxide mineral that forms as earthy masses or fine-grained aggregates. It often has a dark brown to black color.
Next Pinal County mineral: Chalcopyrite