Occurs in Pinal County.
Chemical Formula: Ag3AsS3
Specific Gravity: 5.6-5.8
Luster: Adamantine to resinous
Hardness: 2.5-3
Proustite is a silver arsenic sulfide mineral that often forms as bright red to scarlet crystals. It is found in hydrothermal ore deposits.
Next Pinal County mineral: Pseudoboleite