Wulfenite is an attractive mineral having a shiny nonmetallic luster, an orangish color, and distinctive rectangular tabular crystals. Wulfenite is lead molybdate (PbMoO4). The lead content makes it noticeably heavy for its size.
Wulfenite crystal cluster (field of view ~4.3 cm across).
Wulfenite from the Erupcion/Ahumada Mine, Los Lamentos Mining District, Chihuahua State, northern Mexico (CSM # 51027, Colorado School of Mines Geology Museum, Golden, Colorado, USA).