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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Ernstite from
Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA


Locality type:Mine
Classification
Species:Ernstite
Formula:(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Ernstite data
Locality Data:Click here to view Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:28008
Long-form Identifier:1:3:28008:6
GUID (UUID V4):0
References
 
and/or  
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