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


03031280017363117006219.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
02087240017272015729137.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
09451840017272015739211.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
07792280017272015756746.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
03031280017363117006219.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
07908180017363123152459.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
09451840017272015739211.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
07792280017272015756746.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
03031280017363117006219.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
01154420017272015788065.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
09451840017272015739211.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
07792280017272015756746.jpg
Spodumene

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Locality type:Mine
Classification
Species:Spodumene
Formula:LiAlSi2O6
Comments:Occurs in a lithia pegmatite. Spodumene crystals to 47 feet x 3 feet x 6 feet recorded!!
Quality for species:Excellent - world class for species or very significant. (!!)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Spodumene data
Locality Data:Click here to view Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Photo GalleryView Gallery (5 photos)
Data Identifiers
Mindat Occurrence Record ID:64566
Long-form Identifier:1:3:64566:3
GUID (UUID V4):0
Nearest other occurrences of Spodumene
0.6km (0.3 miles) ⓘExpectation Pegmatite, Keystone Mining District, Pennington County, South Dakota, USA
0.6km (0.4 miles) ⓘNickel Plate Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.1km (0.7 miles) ⓘPeerless Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.2km (0.7 miles) ⓘHugo Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.2km (0.7 miles) ⓘEdison Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
2.9km (1.8 miles) ⓘDike Lode, 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
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
4.6km (2.9 miles) ⓘWood Tin mine, Harney City, Pennington County, South Dakota, USA
References
 
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