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
Almunge complex, Almunge, Uppsala, Uppsala County, Sweden


Locality type:Complex
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 Almunge complex, Almunge, Uppsala, Uppsala County, Sweden
Data Identifiers
Mindat Occurrence Record ID:57614
Long-form Identifier:1:3:57614:1
GUID (UUID V4):0
References
GFF 34, 700
Quensel, P. D. (1913) The alkaline rocks of Almunge. Bulletin of the Geological Institution of the University of Upsala, 12. 129-200
Gorbatschev, R. (1958) On the alkali rocks of Almunge. A preliminary report on a new survey. Bulletin of the Geological Institution of the University of Upsala, 39. 1-69
Doig, Ronald (1970) An alkaline rock province linking Europe and North America. Canadian Journal of Earth Sciences, 7 (1) 22-28 doi:10.1139/e70-002
Gorbatschev, Roland (1970) K-Ar age of biotite from the Almunge alkaline intrusion. Geologiska Föreningen i Stockholm Förhandlingar, 92 (4) 501-502 doi:10.1080/11035897009452981
 
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