WGNHS
Wisconsin Geological and Natural History Survey

Siegenite

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).