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
Tanzberg Mine, Kall, Euskirchen, Cologne, North Rhine-Westphalia, Germany


Locality type:Mine
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 Tanzberg Mine, Kall, Euskirchen, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:104136
Long-form Identifier:1:3:104136:1
GUID (UUID V4):0
Nearest other occurrences of Gypsum
2.9km (1.8 miles) ⓘCopper smelter slag locality, Kall, Euskirchen, Cologne, North Rhine-Westphalia, Germany
15.3km (9.5 miles) ⓘWohlfahrt Mine, Rescheid, Hellenthal, Euskirchen, Cologne, North Rhine-Westphalia, Germany
17.3km (10.7 miles) ⓘSchwalenbach Mine, Kamberg, Hellenthal, Euskirchen, Cologne, North Rhine-Westphalia, Germany
21.8km (13.5 miles) ⓘDorothea Mine, Fuchshofen, Adenau, Ahrweiler, Rhineland-Palatinate, Germany
25.0km (15.5 miles) ⓘMaubacher Bleiberg, Hürtgenwald, Düren, Cologne, North Rhine-Westphalia, Germany
27.4km (17.0 miles) ⓘHoffnung Mine (Spes Mine), Martinsknipp, Ahrbrück, Altenahr, Ahrweiler, Rhineland-Palatinate, Germany
30.0km (18.7 miles) ⓘGraulay quarry, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
32.9km (20.5 miles) ⓘBreinigerberg Mine, Breinig, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
33.4km (20.7 miles) ⓘDiepenlinchen Mine, Mausbach, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
33.8km (21.0 miles) ⓘHenriette Shaft, Diepenlinchen Mine, Mausbach, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
 
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