Specimen Number36-10-012Comments"Black rock", Ag-bearing. Need XRD to evaluate black sulfide phase. XRD of matrix shows quartz + microcline + muscovite.In Teaching CollectionNoMineral(s)quartzmicroclinemuscoviteRock NamegraniteDistrictGeorgetownMineSilver PlumeExternal LinkMindatDeposit TypeVeinGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
36-10-012: granite - Georgetown District - Silver Plume Mine. Franklin College Collections, accessed 13/11/2026, https://digitalcollections.franklin.uga.edu/nodes/view/56634