Occurs in Pinal County.
Chemical Formula: Pb(Mn,Mg)2[(OH)|Si4O12]
Specific Gravity: 3.12
Hardness: 3-4
Orthoserpierite is a manganese lead silicate hydroxide mineral that often forms as yellowish-brown crystals. It is found in hydrothermal ore deposits.
Next Pinal County mineral: Palygorskite