Formula: ZnS Isometric Description: Banded sphalerite, near Hazel Green in Lafayette County, Wisconsin. Sample is about 1 cm long. Sphalerite occurs in a wide range of hydrothermal environments. It is common with chalcopyrite in exhalative massive …
Manitowoc County
Strontianite
Formula: SrCO3 Orthorhombic Description: Strontianite forms white acicular to prismatic crystals. It is found as low temperature hydrothermal mineral and a ground water precipitate, primarily in carbonate sedimentary rocks. LAFAYETTE COUNTY: Radiating crystals on limestone were reported from …