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Balkanite: Cu9Ag5HgS8
Comments: B&W image of a polished section of balkanite with polysynthetic twinning. (AmMin v58:11). Location: Sedmochislenitsi mine, Vratsa district, in the western part of the Stara Planina, Bulgaria. Scale: 330 X. © American Mineralogist
Comments: Gray aggregate of balkanite on quartz. Location: Manhattan District, Nye Co., Nevada, USA. Scale: Picture Size 0.4 cm. © Jeff Weissman / Photographic Guide to Mineral Species