Specimen Number28-9-160Alternate NumberA-210Commentsfrom Bob Carpenter research collectionIn Teaching CollectionNoMineral(s)chalcocitepyriteRock Namepolished plugsDistrictButteDeposit TypePorphyry CopperReference MaterialACL-125: Miller, R.N., ed., 1973, Guidebook for the Butte Field Meeting of Society of Economic Geologists, Butte, Montana, August 18-21, 1973.
28-9-160: polished plugs - Butte District - Undefined Mine. Franklin College Collections, accessed 11/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/36165