Geology Home Page
Roger Weller, geology instructor
Chemical Group: chromate
Chemical Formula: PbCrO4
Color: bright hyacinth red Streak: orange-yellow
Specific Gravity: 6.26 to 6.44
Fracture: conchoidal Luster: adamantine to vitreous
Cleavage: (110) distinct, (001) and (100) less distinct
Crystals are usually prismatic.
Uses: rare, mostly as mineral specimens
Occurrences: Deposited from hot solutions containing chromic acid that encounters lead deposits.
Toxicity: when-swallowed- very high when inhaled- very high