Specimen Number15-3-030Alternate Number78-347Commentsgood example of Johnson Gulch PorphyryIn Teaching CollectionNoMineral(s)feldsparquartzRock NameqfpDistrictLeadvilleMineBlack CloudExternal LinkMindatGeo-LocationundefinedSub-LocationundefinedDeposit TypeVeinGeo-Coords[1]
15-3-030: qfp - Leadville District - Black Cloud Mine. Franklin College Collections, accessed 12/07/2026, https://digitalcollections.franklin.uga.edu/nodes/view/32062