Sphalerite is found with calcite in a quarry in dolostone on Hwy. An old shaft has been sunk at this site. Sphalerite occur in vugs with millerite, marcasite and calcite in limestones near the Washington Street Bridge at Estabrook Park. The sphalerite crystals are up to 3 cm. Spahlaerite is a component of the massive sulfide ore at the Ritchie Creek deposit.
Associated minerals are pyrite, chalcopyrite and large phantom calcite xls.
Sphalerite is found associated with galena and marcasite in a quarry and drill core 1.5 km SE of Avon in Sec. Sphalerite is a component of the massive sulfide ore at the Flambeau deposit near Ladysmith. The sphalerite tends to be more common toward the footwall portion of the deposit. The sphalerite is intergrown with pyrite and is often banded ranging from dark brown to honey brown in color. Sphalerite occurs as cleavable masses in a breccia cement in the Tullar road quarry, in Neenah.