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Parapierrotite: Tl(Sb,As)5S8
Comments: Black semimetallic fragment of parapierrotite. Location: Lookout Pass Area, southeast Tooele County, Utah, USA. Scale: See Image. © Rruff Database
Comments: Silvery metallic prismatic parapierrotite grains in translucent quartz rock. Location: Lookout Pass, Tooele County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species