Specimen Number36-4-018Alternate Number42357AComments"Typical" granite-hosted ore; granite is vuggy and altered, with fluorite + native Au + pyrite in open space. Assay 2.06 opt Au.In Teaching CollectionNoMineral(s)k-sparquartzfluoritegoldpyriteRock NameAu oreDistrictCripple CreekMinePortlandExternal LinkMindatGeo-Location800' level.Deposit TypeDiatremeGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
36-4-018: Au ore - Cripple Creek District - Portland Mine. Franklin College Collections, accessed 13/11/2026, https://digitalcollections.franklin.uga.edu/nodes/view/54997