This sample of pyrrhotite (formed with quartz) is displayed in the Smithsonian Museum of Natural History. Pyrrhotite is a sulfide mineral of iron with the designated composition Fe1-xS . This sample is about 6x10 cm and is from Trepca mine, Srbija, Yugoslavia.
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This sample is about 6x9 cm and is from the same mine. It is also formed with quartz. |