Specimen Number28-9-228Alternate NumberA-309Commentsfrom Bob Carpenter research collectionIn Teaching CollectionNoMineral(s)cupritepyriteRock Namepolished plugsDistrictButteMineLeonardExternal LinkMindatDeposit TypePorphyry CopperGeo-Coords[1] Reference MaterialACL-125: Miller, R.N., ed., 1973, Guidebook for the Butte Field Meeting of Society of Economic Geologists, Butte, Montana, August 18-21, 1973.
28-9-228: polished plugs - Butte District - Leonard Mine. Franklin College Collections, accessed 15/06/2026, https://digitalcollections.franklin.uga.edu/nodes/view/36231