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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Sphalerite from
Bob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA


Locality type:Mine
Classification
Species:Sphalerite
Formula:ZnS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sphalerite data
Locality Data:Click here to view Bob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:212400
Long-form Identifier:1:3:212400:1
GUID (UUID V4):0
Nearest other occurrences of Sphalerite
1.7km (1.1 miles) ⓘSitting Bull pegmatite, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
2.0km (1.2 miles) ⓘBismark-Ida Florence Groups, Keystone Gold Mining District, Pennington County, South Dakota, USA
2.1km (1.3 miles) ⓘDan Patch Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
2.7km (1.6 miles) ⓘEgyptian Group, Keystone Gold Mining District, Pennington County, South Dakota, USA
3.2km (2.0 miles) ⓘColumbia Mine (Maiden Mine), Keystone, Keystone Gold Mining District, Pennington County, South Dakota, USA
4.4km (2.7 miles) ⓘEtta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
4.5km (2.8 miles) ⓘNickel Plate Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
5.2km (3.2 miles) ⓘWhite Cap Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
7.6km (4.7 miles) ⓘBarker-Ferguson Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
7.7km (4.8 miles) ⓘBig Chief Mine, Glendale, 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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