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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Bastnäsite-(La) from
Keller Lake pegmatite, Waupaca County, Wisconsin, USA


Locality type:Pegmatite
Classification
Species:Bastnäsite-(La)
Formula:La(CO3)F
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bastnäsite-(La) data
Locality Data:Click here to view Keller Lake pegmatite, Waupaca County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:274252
Long-form Identifier:1:3:274252:6
GUID (UUID V4):0
References
Rocks & Minerals 79:6 pp409-411
 
and/or  
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