This wulfenite Is from the Red Cloud Mine in the Silver District, Trigo Mountains, La Paz County, Arizona, USA. Almost 40 different mineral species were found in this mine but it is famous for the large tabulat wulfenite crystals that were once found there. Wulfenite is a molybdenite that contains the elements Pb, Mo and O. This specimen is made up of a mixed matrix of oxides mostly limonite that host a couple of dozens crystals up to 9mm. – Excellent color and Luster. It measures 1 13/16 x 1 1/2 x 7/8 inches or 46 x 38 x 22 mm.