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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Posnjakite from
Heidberg Mine, Eckenhagen, Reichshof, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany


05322440017368452008630.jpg
Posnjakite

Heidberg Mine, Eckenhagen, Reichshof, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
05322440017368452008630.jpg
Posnjakite

Heidberg Mine, Eckenhagen, Reichshof, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
09114780017272047832283.jpg
Posnjakite

Heidberg Mine, Eckenhagen, Reichshof, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
Locality type:Mine
Classification
Species:Posnjakite
Formula:Cu4(SO4)(OH)6 · H2O
Confirmation
Validity:Confirmed
Confirmation Methods:Dealer/Collection Label
Data
Mineral Data:Click here to view Posnjakite data
Locality Data:Click here to view Heidberg Mine, Eckenhagen, Reichshof, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:978111
Long-form Identifier:1:3:978111:5
GUID (UUID V4):0
References
Matteo Chinellato collection
 
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