Formula: CuS Hexagonal
Description: Covellite forms in oxidized and supergene zones as an alteration product of other copper minerals.
FOREST COUNTY: Covellite forms thin supergene coatings on other sulfide minerals at the Crandon deposit (May and Schmidt, 1982; Lamb and Rowe, 1989).
IOWA COUNTY: Covellite is found with chalcopyrite, chalcocite, galena, sphalerite, pyrite and marcasite at the Pierson Prospect in the NW Sec. 5 T.4N R.3E, near Mineral Point (Heyl et al., 1959). The authors note the mineral as found in small amounts throughout the Upper Mississippi Valley zinc-lead district.
WINNEBAGO COUNTY: Covellite is reported from the Lutz Quarry, along Route 44 west Oshkosh. Here it is in vugs in dolostone with bornite, cuprite, sphalerite, marcasite, pyrite and calcite (USGS, 1976).