Geology Home Page
Roger Weller, geology instructor
Chemical Group: molybdate
Chemical Formula: PbMoO4
Color: orange-yellow, orange, bright red, olive green, yellow, gray, brown
Streak: white Luster: resinous to adamantine
Hardness: 2.75 to 3
Specific Gravity: 6.7 to 7.0
Cleavage: on (111) direction, very smooth
Tetragonal system (hemimorphic)
Crystals are commonly square tabular, often very thin.
Identifying Characteristics: Crystals range from yellow to red, thins square crystals.
Occurrences: Wulfenite is found in the oxidation zone above lead and zinc deposits.
Red Cloud Mine, Yuma
Old Yuma Mine, Tucson Mountains, Tucson
Mina de San Francisco mine, Magdalena, Sonora
Los Lamentos, Chihuahua
Toxicity: when-swallowed- very high when inhaled- very high
Additional Information: Can be destroyed with hydrochloric acid, so do not use this chemical for cleaning specimens.