Plumbotsumite

Occurs in Pinal County.

Chemical Formula: Pb₅(VO₄)₃Cl

Specific Gravity: 7.09-7.13

Luster: Subadamantine to resinous

Hardness: 2.5-3

Plumbotsumite is a lead vanadate chloride mineral that often forms as yellow to orange-yellow crystals or crusts. It is found in the oxidation zones of lead ore deposits.

Next Pinal County mineral: Polybasite