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Pizgrischite: (Cu,Fe)Cu14PbBi17S35
Comments: SEM images of twinned pizgrischite crystals extracted from quartz matrix by treatment with dilute hydrofluoric acid. (CanMin, v45:1229). Location: Piz Grisch Mountain, Val Ferrera, Graubünden, Switzerland. Scale: See Image. © S. Ansermet/Canadian Mineralogist