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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K Feldspar from
Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA


Locality type:Mine
Classification
Species:'K Feldspar' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view K Feldspar data
Locality Data:Click here to view Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:993785
Long-form Identifier:1:3:993785:7
GUID (UUID V4):0
Nearest other occurrences of K Feldspar
1.5km (0.9 miles) ⓘConfidence No. 1 Lode, Keystone Mining District, Pennington County, South Dakota, USA
3.2km (2.0 miles) ⓘPhillip and Phyllis Lodes, Keystone Mining District, Pennington County, South Dakota, USA
3.2km (2.0 miles) ⓘKing Lithia Mine, Greyhound Gulch, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
3.3km (2.1 miles) ⓘBig Shot Occurrence, Keystone Mining District, Pennington County, South Dakota, USA
3.7km (2.3 miles) ⓘGlendale Mine, Glendale, Keystone Mining District, Pennington County, South Dakota, USA
3.9km (2.4 miles) ⓘNew England Prospect, Unorganized mining district [5], Pennington County, South Dakota, USA
4.5km (2.8 miles) ⓘMaderposson Occurrence, Keystone Mining District, Pennington County, South Dakota, USA
5.0km (3.1 miles) ⓘBeryl Feldspar Mine, Unorganized mining district [1], Custer County, South Dakota, USA
5.5km (3.4 miles) ⓘJumbo Lode Occurrence, Unorganized mining district [1], Custer County, South Dakota, USA
6.9km (4.3 miles) ⓘMaryland Lode (Olds Lode), Unorganized mining district [1], Custer County, South Dakota, USA
References
Černý, Petr, Chapman, Ronald (1984) Paragenesis, chemistry and structural state of adularia from granitic pegmatites. Bulletin de Minéralogie, 107 (3) 369-384 doi:10.3406/bulmi.1984.7767
 
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