Schultenite is an anhydrous lead arsenate named after August Benjamin de Schulten, chemist, University of Helsinki, Helsinki, Finland. It occurs as colorless, transparent, monoclinic crystals exhibiting a vitreous luster that are similar in habit to gypsum, with crystal faces that are commonly striated. Schultenite is found associated with anglesite, bayldonite, and keyite at the Tsumeb mine, Tsumeb, Otjikoto Region, Namibia, the type locality. Other localities include: Deer Hills vein, Caldbeck Fells, Cumbria, England; Grabanz, near Finkenstein, Austria; and Jachymov and Abertamy, Jachymov district, Krusne Hory Mountains (Erzgebirge), Bohemia, Czech Republic. German localities include: Michael mine, Weiler, near Lahr, the Geiges mine, near Schramberg, Black Forest; St. Andreasberg, Harz Mountains; from Ramsbeck, North Rhein-Westphalia; and the Friedrichssegen mine, Bad Ems district, Rhineland Palatinate. It is also found at Gifford Lake, near North Bend, King Co., Washington, USA.
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