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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Epsomite from
Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK


Locality type:Colliery
Classification
Species:Epsomite
Formula:MgSO4 · 7H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Epsomite data
Locality Data:Click here to view Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:82045
Long-form Identifier:1:3:82045:9
GUID (UUID V4):0
References
Ian Jones or national Museum of Wales collections
 
and/or  
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