Mineral, PbMoO4; sp. gr. 6.5–7.0; hardness 3; tetragonal; orange-yellow, olive-green, or brown; white streak; resinous lustre; crystals usually square plates or tablets, sometimes occurs massive, granular, or botryoidal; cleavage good {101}; sub-conchoidal fracture; occurs as a secondary mineral in the oxidized zones of ore minerals of lead and molybdenum, and in association with anglesite, cerussite, and pyromorphite.