Specimen Number32-10-034Alternate Number56-4-40CommentsEquigranular fine- to medium-grained nepheline syenite.In Teaching CollectionNoMineral(s)nephelinepyroxeneRock Namenepheline syeniteDistrictPowderhornMineIron Hill, COExternal LinkMIndatDeposit TypeCarbonatiteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
32-10-034: nepheline syenite - Powderhorn District - Iron Hill, CO Mine. Franklin College Collections, accessed 14/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/53819