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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Chalcoalumite from
Knappschaftsglück Mine, Neunkirchen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany


Locality type:Mine
Classification
Species:Chalcoalumite
Formula:CuAl4(SO4)(OH)12 · 3H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcoalumite data
Locality Data:Click here to view Knappschaftsglück Mine, Neunkirchen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:704459
Long-form Identifier:1:3:704459:5
GUID (UUID V4):0
Nearest other occurrences of Chalcoalumite
2.2km (1.3 miles) ⓘWolf Mine, Herdorf, Daaden-Herdorf, Altenkirchen, Rhineland-Palatinate, Germany
2.7km (1.7 miles) ⓘBreimehl Mine, Brachbach, Kirchen (Sieg), Altenkirchen, Rhineland-Palatinate, Germany
3.9km (2.5 miles) ⓘEisenzecher Zug mine, Eiserfeld, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
4.4km (2.7 miles) ⓘBrüderbund Mine, Kohlenbach Valley, Eiserfeld, Siegen, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
8.7km (5.4 miles) ⓘKäusersteimel Mine, Kausen, Betzdorf-Gebhardshain, Altenkirchen, Rhineland-Palatinate, Germany
13.5km (8.4 miles) ⓘFriedrich Mine, Steckenstein, Mittelhof, Wissen, Altenkirchen, Rhineland-Palatinate, Germany
21.8km (13.6 miles) ⓘBrüche Mine, Ferndorf, Kreuztal, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
22.1km (13.7 miles) ⓘWildermann Mine, Ferndorf, Kreuztal, Siegen-Wittgenstein, Arnsberg, North Rhine-Westphalia, Germany
50.5km (31.4 miles) ⓘCastor Mine, Loope, Engelskirchen, Oberbergischer Kreis, Cologne, North Rhine-Westphalia, Germany
58.1km (36.1 miles) ⓘFriedrichssegen Mine, Friedrichssegen, Lahnstein, Rhein-Lahn-Kreis, Rhineland-Palatinate, Germany
References
Henrich, J. M. (2010): Chalkoalumit - Rarität aus dem Siegerland. Mineralien-Welt 21 (4), 14-17.
 
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