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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Szomolnokite from
Crumlin Colliery (Crumlin Navigation Colliery), Crumlin, Caerphilly, Wales, UK


Locality type:Colliery
Classification
Species:Szomolnokite
Formula:FeSO4 · H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Szomolnokite data
Locality Data:Click here to view Crumlin Colliery (Crumlin Navigation Colliery), Crumlin, Caerphilly, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:88200
Long-form Identifier:1:3:88200:6
GUID (UUID V4):0
References
(BM 1985 MI.33592 & 33593). X-ray diffraction analysis by the NHM
 
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