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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Berthierine from
Sheep Mountain Mine, Fremont County, Wyoming, USA


Locality type:Project
Classification
Species:Berthierine
Formula:(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Berthierine data
Locality Data:Click here to view Sheep Mountain Mine, Fremont County, Wyoming, USA
Data Identifiers
Mindat Occurrence Record ID:41023
Long-form Identifier:1:3:41023:4
GUID (UUID V4):0
References
Hausel, W. Dan, Jacobson, Mark (2001) Wyoming Mineral Locality Index. Rocks & Minerals, 76 (6) 380-393 doi:10.1080/00357520109603245
 
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