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Purpurite from
Custer Mountain lode (Snookum mine), Custer, Custer Mining District, Custer Co., South Dakota, USA

Locality type:Lode
Classification
Species:Purpurite
Formula:Mn3+(PO4)
Comments:Parent lithiophilite of this locality has Mn/Mn + Fe = 0.71-0.74 (Moore, 2000).
Confirmation
Validity:Believed Valid
References
References:Roberts, W. L. and Rapp, G., 1965, Mineralogy of the Black Hills, South Dakota School of Mines and Technology, Rapid City, SD, pp. 268.
Moore, P. B., 2000, Analyses of Primary Phosphates from Pegmatites in Maine and Other Localities, in V. T. King (editor), Mineralogy of Maine. Mining History, Gems, and Geology, Maine Geological Survey, Augusta, Maine, p. 333-336.
Data
Mineral Data:Click here to view Purpurite data
Locality Data:Click here to view Custer Mountain lode (Snookum mine), Custer, Custer Mining District, Custer Co., South Dakota, USA
Nearest other occurrences of Purpurite
3.1km (1.9 miles) Earl Lode, Custer Mining District, Custer Co., South Dakota, USA
9.1km (5.6 miles) Ross Mine (Highland lode; John Ross Mine), Berne, Custer Mining District, Custer Co., South Dakota, USA
9.4km (5.8 miles) Tip Top Mine (Tip Top pegmatite), Fourmile, Custer Mining District, Custer Co., South Dakota, USA
11.5km (7.1 miles) Helen Beryl Mine (Sweepstakes Beryl; Big Tom claim; Kem claim), Fourmile, Custer Mining District, Custer Co., South Dakota, USA
12.0km (7.4 miles) Louise & Hunter Claim (Hunter and Louise Spodumene Dike), Oreville Mining District, Pennington Co., South Dakota, USA
66.1km (41.0 miles) Ross Hannibal Mine (North Star Mine; Hannibal Mine; and Mikado Mine), Lead Mining District, Lawrence Co., South Dakota, USA
 
Mineral and/or Locality  
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