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Krupkaite: PbCuBi3S6 Friedrichite: Pb5Cu5Bi7S18 Benjaminite: (Ag,Cu)3(Bi,Pb)7S12
Comments: Crystals of a mixture of friedrichite, krupkaite, and benjaminite, with quartz crystals.
Location: Estela Mine, Julcani District, Junin, Peru.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Comments: Acicular, fine metallic crystal sprays of krupkaite to 4mm with pale yellow manganoan siderite.
Location: Julcani district, Peru.
Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix
Krupkaite: PbCuBi3S6 Paarite: Cu1.7Pb1.7Bi6.3S12
Comments: A mosaic of large grains of a low-Cu bismuthinite derivative, decomposed into an intergrowth of paarite (bd42) and krupkaite (bd49).
Location: In quartz veins of the Felbertal scheelite deposit, Salzburg Province, Austria. (CanMin v43:909).
Scale: See Image.
© Canadian Mineralogist