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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Beryl from
Dan Patch West Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA


Locality type:Mine
Classification
Species:Beryl
Formula:Be3Al2(Si6O18)
Comments:Occurs in pegmatite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Beryl data
Locality Data:Click here to view Dan Patch West Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:60576
Long-form Identifier:1:3:60576:2
GUID (UUID V4):0
Nearest other occurrences of Beryl
0.9km (0.5 miles) ⓘMonte Carlo Prospect, Keystone Mining District, Pennington County, South Dakota, USA
1.2km (0.7 miles) ⓘEtta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.4km (0.8 miles) ⓘPeerless Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.4km (0.9 miles) ⓘDan Patch Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.5km (0.9 miles) ⓘHugo Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.7km (1.0 miles) ⓘNickel Plate Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.7km (1.1 miles) ⓘHenry Tin Occurrence, Keystone Mining District, Pennington County, South Dakota, USA
1.9km (1.2 miles) ⓘSitting Bull pegmatite, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
2.2km (1.3 miles) ⓘBig Shot Occurrence, Keystone Mining District, Pennington County, South Dakota, USA
2.3km (1.4 miles) ⓘEdison Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
References
Rocks & Min.:60:116.
U.S. Geological Survey Professional Paper 297
Norton, James J. (1964) Pegmatites and other Precambrian Rocks in the Southern Black Hills; Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota. Professional Paper 297-E. US Geological Survey p.293-341. doi:10.3133/pp297e
 
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