Occurs in Pinal County.
Chemical Formula: Cu8(Si8O22)(OH)4·nH2O
Specific Gravity: 3.0-3.2
Hardness: 4-4.5
Plancheite is a copper silicate hydroxide mineral that often forms as blue to blue-green radial aggregates or crusts. It is found in copper ore deposits.
Next Pinal County mineral: Plattnerite