Specimen Number36-4-006Alternate Number18720CommentsAu ore; very vuggy quartz with very fine-grained native Au + either calaverite or sylvanite.In Teaching CollectionNoMineral(s)quartzgoldcalaveriteRock NameAu oreDistrictCripple CreekMinePortlandExternal LinkMindatGeo-Location17th level.Deposit TypeDiatremeGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
36-4-006: Au ore - Cripple Creek District - Portland Mine. Franklin College Collections, accessed 13/11/2026, https://digitalcollections.franklin.uga.edu/nodes/view/54990