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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Gypsum from
Julia coal mine, Baukau, Herne, Arnsberg, North Rhine-Westphalia, Germany


Locality type:Colliery
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Julia coal mine, Baukau, Herne, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:986919
Long-form Identifier:1:3:986919:6
GUID (UUID V4):0
Nearest other occurrences of Gypsum
14.6km (9.1 miles) ⓘAuguste Victoria coal mine, Hüls, Marl, Recklinghausen, Münster, North Rhine-Westphalia, Germany
18.0km (11.2 miles) ⓘChristian Levin coal mine, Dellwig, Essen, Düsseldorf, North Rhine-Westphalia, Germany
21.6km (13.4 miles) ⓘFranz-Haniel Mine, Bottrop, Münster, North Rhine-Westphalia, Germany
24.8km (15.4 miles) ⓘVorhalle clay pit, Hagen, Arnsberg, North Rhine-Westphalia, Germany
27.3km (16.9 miles) ⓘRohdenhaus Quarry (incl. Krieger Quarry), Rohdenhaus, Wülfrath, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
29.9km (18.6 miles) ⓘNeu-Diepenbrock Mine, Saarn, Mülheim an der Ruhr, Düsseldorf, North Rhine-Westphalia, Germany
30.4km (18.9 miles) ⓘDonnerkuhle quarry, Hagen, Arnsberg, North Rhine-Westphalia, Germany
31.1km (19.3 miles) ⓘPrangenhaus quarry, Wülfrath, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
35.6km (22.1 miles) ⓘGenna zinc smelter slag locality, Helmke quarry nature reserve, Letmathe, Iserlohn, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany
38.3km (23.8 miles) ⓘNeandertal limestone quarries, Mettmann, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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