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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Nepheline from
Wilson Springs (Potash Sulfur Springs), Garland County, Arkansas, USA


Locality type:Spring
Classification
Species:Nepheline
Formula:Na3K(Al4Si4O16)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Nepheline data
Locality Data:Click here to view Wilson Springs (Potash Sulfur Springs), Garland County, Arkansas, USA
Data Identifiers
Mindat Occurrence Record ID:87761
Long-form Identifier:1:3:87761:5
GUID (UUID V4):0
Nearest other occurrences of Nepheline
3.4km (2.1 miles) ⓘV intrusive, Lake Catherine, Garland County, Arkansas, USA
10.3km (6.4 miles) ⓘEudialyte pegmatite, Magnet Cove, Hot Spring County, Arkansas, USA
11.4km (7.1 miles) ⓘMagnet Cove Baptist Church area, Magnet Cove, Hot Spring County, Arkansas, USA
12.1km (7.5 miles) ⓘDiamond Jo Quarry, Magnet Cove, Hot Spring County, Arkansas, USA
12.3km (7.7 miles) ⓘMo-Ti Corporation prospect, Magnet Cove, Hot Spring County, Arkansas, USA
13.0km (8.1 miles) ⓘJones Mill Quarry, Magnet Cove, Hot Spring County, Arkansas, USA
14.3km (8.9 miles) ⓘKimzey Magnetite Mine, Magnet Cove, Hot Spring County, Arkansas, USA
48.1km (29.9 miles) ⓘGranite Mountain No. 3 Quarry, Sweet Home, Granite Mountain complex, Saline County, Arkansas, USA
67.7km (42.1 miles) ⓘBig Rock Quarry (3M Quarry; Arch Street Pike Quarry), Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA
70.0km (43.5 miles) ⓘGranite Mountain Quarry No. 1, Granite Mountain Area, Little Rock, Pulaski County, Arkansas, USA
References
Heathcote, Richard C., Mccormick, George R. (1989) Major-cation substitution in phlogopite and evolution of carbonatite in the Potash Sulphur Springs complex, Garland County, Arkansas. American Mineralogist, 74 (1-2) 132-140
Eby, Nelson; Charnley, Norman; Tiella, Gino; Burkhardt, Louis (2025) The Arkansas Alkaline Province, Southeastern USA: A Synthesis of New and Existing Chemical and Petrologic Data and Petrogenetic Considerations. Minerals, 15 (11). doi:10.3390/min15111133
 
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