Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Autunite from
Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA


Locality type:Mine
Classification
Species:Autunite
Formula:Ca(UO2)2(PO4)2 · 10-12H2O
Comments:Occurs in a lithia pegmatite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Autunite data
Locality Data:Click here to view Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:64574
Long-form Identifier:1:3:64574:2
GUID (UUID V4):0
Nearest other occurrences of Autunite
1.1km (0.7 miles) ⓘPeerless Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
2.4km (1.5 miles) ⓘDan Patch Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
3.4km (2.1 miles) ⓘBig Chief Mine, Glendale, Keystone Mining District, Pennington County, South Dakota, USA
4.1km (2.5 miles) ⓘBarker-Ferguson Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
4.4km (2.7 miles) ⓘBob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
10.7km (6.7 miles) ⓘNovember Mine, The Needles, Custer State Park, Custer County, South Dakota, USA
17.1km (10.6 miles) ⓘHigh Climb Mine, Custer, Custer Mining District, Custer County, South Dakota, USA
18.3km (11.4 miles) ⓘCuster Mountain lode (Snookum mine), Custer, Custer Mining District, Custer County, South Dakota, USA
24.3km (15.1 miles) ⓘRoss Mine, Berne, Custer Mining District, Custer County, South Dakota, USA
27.2km (16.9 miles) ⓘTip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
References
Rocks & Minerals: 57: 160
USGS Bull 380D
 
and/or  
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