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Jahnsite-(CaMnMg) from
Etta Mine, Keystone, Keystone Mining District, Pennington Co., South Dakota, USA

Locality type:Mine
Formula:{Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
Validity:Believed Valid
References:Rocks & Minerals: 67(6): 380-388.
Mineral Data:Click here to view Jahnsite-(CaMnMg) data
Locality Data:Click here to view Etta Mine, Keystone, Keystone Mining District, Pennington Co., South Dakota, USA
Nearest other occurrences of Jahnsite-(CaMnMg)
3.4km (2.1 miles) Big Chief Mine (Johnson pegmatite), Glendale, Keystone Mining District, Pennington Co., South Dakota, USA
27.2km (16.9 miles) Tip Top Mine (Tip Top pegmatite), Fourmile, Custer Mining District, Custer Co., South Dakota, USA
Mineral and/or Locality  
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