A mineral with the chemical composition PbSO₄. Anglesite occurs in white or gray, orthorhombic, tabular or prismatic crystals or compact masses (see illus.). It is a common secondary mineral, usually formed by the oxidation of galena. Fracture is conchoidal and luster is adamantine. Hardness is 2.5–3 on Mohs scale and specific gravity is 6.38. Anglesite fuses readily in a candle flame. It is soluble with difficulty in nitric acid. The mineral does not occur in large enough quantity to be mined as an ore of lead, and is therefore of no particular commercial value. Fine exceptional crystals of anglesite have been found throughout the world. In the United States good crystals of anglesite have been found at the Wheatley Mine, Phoenixville, Chester County, Pennsylvania, and in the Coeur d'Alene district of Shoshone County, Idaho.