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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Illite from
Wildermann Mine, Ferndorf, Kreuztal, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany


Locality type:Mine
Classification
Species:Muscovite var: Illite
Formula:K0.65Al2.0[Al0.65Si3.35O10](OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Illite data
Locality Data:Click here to view Wildermann Mine, Ferndorf, Kreuztal, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:689999
Long-form Identifier:1:3:689999:8
GUID (UUID V4):0
Nearest other occurrences of Illite
11.4km (7.1 miles) ⓘFriedericke mine, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
16.9km (10.5 miles) ⓘPrinz Friedrich mine, Obersdorf, Wilnsdorf, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
18.2km (11.3 miles) ⓘEisenzecher Zug mine, Eiserfeld, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
27.1km (16.9 miles) ⓘSchöne Aussicht Mine, Burbach, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
38.1km (23.7 miles) ⓘHardtkopf, Hellefeld, Sundern, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
50.3km (31.2 miles) ⓘFöckinghausen quarry, Bestwig, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
53.4km (33.2 miles) ⓘApollo Mine, Raubach, Puderbach, Neuwied, Rhineland-Palatinate, Germany
79.3km (49.3 miles) ⓘFriedrichssegen Mine, Friedrichssegen, Lahnstein, Rhein-Lahn-Kreis, Rhineland-Palatinate, Germany
References
Reinhardt, M. (2010) Die Mineralien der Grube Wildermann bei Müsen im Siegerland. Lapis, 35 (11) 13-28
 
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