Specimen Number32-10-012Alternate Number56-4-13CommentsSilicate-carbonate rock. XRD confirms dolomite + quartz + biiotite + aegirine + microcline (see pattern below).In Teaching CollectionNoMineral(s)dolomiteaegirinequartzbiotitemicroclineRock NamecalcsilicateDistrictPowderhornMineIron Hill, COExternal LinkMIndatGeo-Location3/4 mile E of Iron Hill.Deposit TypeCarbonatiteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
32-10-012: calcsilicate - Powderhorn District - Iron Hill, CO Mine. Franklin College Collections, accessed 13/11/2026, https://digitalcollections.franklin.uga.edu/nodes/view/53797