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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Strüverite from
Jones Mill Quarry, Magnet Cove, Hot Spring County, Arkansas, USA


Locality type:Quarry
Classification
Species:Rutile var: Strüverite
Formula:(Ti,Ta,Fe)O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Strüverite data
Locality Data:Click here to view Jones Mill Quarry, Magnet Cove, Hot Spring County, Arkansas, USA
Data Identifiers
Mindat Occurrence Record ID:484101
Long-form Identifier:1:3:484101:2
GUID (UUID V4):0
References
Karl Estes (1998) Mineral News, 14, #5, 8-10.
Min News (1998) 14:4 pp 1,2,5
 
and/or  
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