Coloradoite, acanthite, and jarosite from the Cripple Creek district, Teller County, Colorado

Coloradoite (HgTe), acanthite (Ag₂ S), and jarosite (KFe₃(S0₄)₂ (OH)₆) have been identified in rocks from the Cripple Creek district, Colorado. Neither acanthite nor jarosite has previously been reported from this mining district. Although the occurrence of coloradoite was reported, its identification was never actually verified. The presence of acanthite may explain a discrepancy between the relative proportions of gold and silver as shown by mill reports and geochemical data.