Location: Charcas, San Luis Potosi, Mexico
Location: Democratic Republic of the Congo
Location: North of Lake George, Colorado
Location: Goboboseb Mtns., Brandberg Dist., Erongo Region, Namibia
Location: Katanga, Shaba Province, Democratic Republic of the Congo
Location: Erongo Mountains, Erongo Region, Namibia
Location: Namaqualand, Northern Cape Province, S. Africa
Location: Miraflores Mine, Huanuco, Huamalias, Peru
Location: Mina La Ojuela, Mapimi, Durango, Mexico
Location: Xinjiang Province, China
