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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Garyansellite from
Big Chief Mine, Glendale, Keystone Mining District, Pennington County, South Dakota, USA


Locality type:Mine
Classification
Species:Garyansellite
Formula:Mg2Fe3+(PO4)2(OH) · 2H2O
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Garyansellite data
Locality Data:Click here to view Big Chief Mine, Glendale, Keystone Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:5543
Long-form Identifier:1:3:5543:7
GUID (UUID V4):0
References
 
and/or  
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