Occurs in Pinal County. Common in Arizona.
Chemical Formula: Zn4Si2O7(OH)2·H2O
Specific Gravity: 3.4-3.5
Hardness: 4.5-5
Hemimorphite is a zinc silicate mineral that often forms as blue to green botryoidal masses or crystals. It is found in oxidized zinc ore deposits.
Next Pinal County mineral: Hetaerolite