WGNHS
Wisconsin Geological and Natural History Survey

Siegenite

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Gray metallic siegenite with brassy chalcopyrite in dull gray limestone. From Fredericktown, Missouri. Field of view is about 1.5 cm across. (Photo by W. Cordua.)

Formula: (Co,Ni)3S4 Isometric

Description:Siegenite is an uncommon sulfide of nickel and cobalt found in hydrothermal deposits.WOOD COUNTY: Siegenite has been identified by XRD and EDS analysis of small gray metallic xls. found at the Frederick Schill Quarry, north of Vesper (SW NW sec. 5 T.23N. R4E). (Buchholz, 1999).