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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Gordaite from
Genna zinc smelter slag locality, Helmke quarry nature reserve, Letmathe, Iserlohn, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany


Locality type:Slag Locality
Classification
Species:Gordaite
Formula:NaZn4(SO4)(OH)6Cl · 6H2O
Formation:Post-mining/Anthropogenic
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gordaite data
Locality Data:Click here to view Genna zinc smelter slag locality, Helmke quarry nature reserve, Letmathe, Iserlohn, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:1015684
Long-form Identifier:1:3:1015684:9
GUID (UUID V4):0
References
www.mg-mineralien-fossilien.de (n.d.) http://www.mg-mineralien-fossilien.de/?Rpage=sauerland/?Rpage=letmathe1.html
 
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