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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Epidote Supergroup from
Owl's Head Mountain, Benton, Grafton County, New Hampshire, USA


Locality type:Mountain
Classification
Species:'Epidote Supergroup' (not an IMA approved species)
Formula:(A1A2)(M1M2M3)O4[Si2O7][SiO4]O10
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Epidote Supergroup data
Locality Data:Click here to view Owl's Head Mountain, Benton, Grafton County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:656233
Long-form Identifier:1:3:656233:5
GUID (UUID V4):0
References
Fogg, Alonzo J. (1874). Statistics and Gazetteer of New Hampshire
 
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