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
Beacon Pole Hill quarry, Cumberland, Providence County, Rhode Island, USA


Locality type:Quarry
Classification
Species:Arfvedsonite
Formula:NaNa2(Fe42+Fe3+)Si8O22(OH)2
Quality for species:Poor for species, only of interest for locality collectors. (#)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arfvedsonite data
Locality Data:Click here to view Beacon Pole Hill quarry, Cumberland, Providence County, Rhode Island, USA
Data Identifiers
Mindat Occurrence Record ID:37114
Long-form Identifier:1:3:37114:8
GUID (UUID V4):0
References
Miller, C. E. (1971) Rhode Island Minerals and their Locations. University of Rhode Island.
 
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