Occurs in Pinal County. Common in Arizona.
Chemical Formula: (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6
Specific Gravity: 3.2-3.6
Hardness: 5.5-6
Augite is a common pyroxene mineral found in igneous and metamorphic rocks. It is typically dark green to black in color and has distinct cleavage.
Next Pinal County mineral: Aurichalcite