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
Central Khanneshin deposit, Khanneshin complex (Khanneshin carbonatite complex), Reg District, Helmand, Afghanistan


Locality type:Deposit
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 Central Khanneshin deposit, Khanneshin complex (Khanneshin carbonatite complex), Reg District, Helmand, Afghanistan
Data Identifiers
Mindat Occurrence Record ID:1327280
Long-form Identifier:1:3:1327280:1
GUID (UUID V4):0
References
Vikhter, B.Ya., Yeremenko, G.K., Chmyrev, V.M. (1976) A young volcanogenic carbonatite complex in Afghanistan. International Geology Review, 18 (11) 1305-1312 doi:10.1080/00206817609471346
Mars, John C., Rowan, Lawrence C. (2011) ASTER spectral analysis and lithologic mapping of the Khanneshin carbonatite volcano, Afghanistan. Geosphere, 7. 276-289 doi:10.1130/ges00630.1
 
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