Mineral: Quartz, Siderite, Chalcopyrite
Locality: Pfannenberger Einigkeit Mine, Salchendorf, Neunkirchen, Siegen-Wittgenstein District, Arnsberg, North Rhine-Westphalia/Nordrhein-Westfalen, Germany
Dimensions: Specimen size 4 cm

Description: Photo © Andreas Gerstenberg

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