Learn about groundwater, geology, and groundwater-related concerns in Wisconsin with hydrogeologist and retired WI State Geologist/Director of the WGNHS Dr. Ken Bradbury :
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Cobaltite
Formula: CoAsS Orthorhombic Description: Cobaltite is a rare mineral found as silvery metallic grains in hydrothermal deposits. When present in sufficient quantities, it is used as an ore of cobalt. LAFAYETTE COUNTY: Cobaltite (or possibly safflorite -CoAs2) …