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Jahnsite Group from
Helen Beryl Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA


Locality type:Mine
Classification
Species:'Jahnsite Group' (not an IMA approved species)
Formula:XM1M22M32(H2O)8(OH)2(PO4)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Jahnsite Group data
Locality Data:Click here to view Helen Beryl Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:210813
Long-form Identifier:1:3:210813:1
GUID (UUID V4):0
Nearest other occurrences of Jahnsite Group
9.1km (5.7 miles) ⓘSoda Spar Pegmatite, Glendale, Keystone Mining District, Pennington County, South Dakota, USA
11.1km (6.9 miles) ⓘWhite Elephant Mine, Cicero Peak, Pringle, Custer Mining District, Custer County, South Dakota, USA
13.0km (8.1 miles) ⓘBull Moose Mine, Custer, Custer Mining District, Custer County, South Dakota, USA
29.5km (18.3 miles) ⓘBob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
29.8km (18.5 miles) ⓘWhite Cap Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
32.3km (20.1 miles) ⓘBarker-Ferguson Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
References
Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635
 
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