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


Locality type:Spring
Classification
Species:Ilvaite
Formula:CaFe3+Fe22+(Si2O7)O(OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ilvaite data
Locality Data:Click here to view Wilson Springs (Potash Sulfur Springs), Garland County, Arkansas, USA
Data Identifiers
Mindat Occurrence Record ID:87750
Long-form Identifier:1:3:87750:9
GUID (UUID V4):0
References
Howard, J. Michael, Owens, Don R. (1995) Minerals of the Wilson Springs Vanadium Mines. Rocks & Minerals, 70 (3) 154-170 doi:10.1080/00357529.1995.9926616
Smith, Arthur E. Jr. (1997) Collecting Arkansas Minerals. L. R. Ream Publishing, Coeur d'Alene, ID.
 
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