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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Arfvedsonite from
Almunge complex, Almunge, Uppsala, Uppsala County, Sweden


Locality type:Complex
Classification
Species:Arfvedsonite
Formula:NaNa2(Fe42+Fe3+)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arfvedsonite data
Locality Data:Click here to view Almunge complex, Almunge, Uppsala, Uppsala County, Sweden
Data Identifiers
Mindat Occurrence Record ID:57624
Long-form Identifier:1:3:57624:8
GUID (UUID V4):0
References
 
and/or  
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