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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Protopartzite from
Blagill Mine, Alston Moor, Eden, Cumbria, England, UK


Locality type:Mine
Classification
Species:'Protopartzite' (not an IMA approved species)
Formula:Cu(Sb,As,Fe,Zn)1.3(O,OH)6.8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Protopartzite data
Locality Data:Click here to view Blagill Mine, Alston Moor, Eden, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:8865
Long-form Identifier:1:3:8865:7
GUID (UUID V4):0
References
Clark, A. M. (1993) Hey's Mineral Index - Mineral Species, Varieties and Synonyms (3rd ed.). Natural History Museum.p.566
 
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