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
Hardtkopf, Hellefeld, Sundern, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany


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 Hardtkopf, Hellefeld, Sundern, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:105253
Long-form Identifier:1:3:105253:4
GUID (UUID V4):0
Nearest other occurrences of Gypsum
8.6km (5.4 miles) ⓘA46 Highway bridge, Uentrop, Arnsberg, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
9.6km (6.0 miles) ⓘLanwehr quarry, Müschede, Arnsberg, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
10.6km (6.6 miles) ⓘCaspari Mine, Uentrop, Arnsberg, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
14.6km (9.1 miles) ⓘ"An der Seilbahn" slag locality, Hüsten, Arnsberg, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
15.2km (9.5 miles) ⓘCalcite quarry, Holzen, Arnsberg, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
20.2km (12.6 miles) ⓘAlexander Mine, Meschede, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
21.6km (13.4 miles) ⓘMeggen Mine, Lennestadt, Olpe, Arnsberg, North Rhine-Westphalia, Germany
22.1km (13.7 miles) ⓘFöckinghausen quarry, Bestwig, Hochsauerlandkreis, Arnsberg, North Rhine-Westphalia, Germany
22.5km (14.0 miles) ⓘBecke-Oese quarry, Hemer, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany
25.7km (15.9 miles) ⓘUnnamed quarry, Belecke, Warstein, Soest, Arnsberg, North Rhine-Westphalia, Germany
References
Wittern, Artur (2001) Mineralfundorte und ihre Minerale in Deutschland (1st ed.) Schweizerbart, Stuttgart.
 
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