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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Corundum from
Dungberg (Dungkopf), Unkelbach, Remagen, Ahrweiler, Rhineland-Palatinate, Germany


Classification
Species:Corundum
Formula:Al2O3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Corundum data
Locality Data:Click here to view Dungberg (Dungkopf), Unkelbach, Remagen, Ahrweiler, Rhineland-Palatinate, Germany
Data Identifiers
Mindat Occurrence Record ID:665403
Long-form Identifier:1:3:665403:0
GUID (UUID V4):0
Nearest other occurrences of Corundum
2.0km (1.3 miles) ⓘUnkelstein, Unkelbach, Remagen, Ahrweiler, Rhineland-Palatinate, Germany
8.3km (5.1 miles) ⓘMinderberg quarry (Düstemich), Linz am Rhein, Linz am Rhein, Neuwied, Rhineland-Palatinate, Germany
8.3km (5.2 miles) ⓘDrachenfels, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
8.9km (5.5 miles) ⓘWolkenburg, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
11.0km (6.9 miles) ⓘPerlenhardt, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
11.2km (6.9 miles) ⓘÖlberg (Oelberg), Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
11.6km (7.2 miles) ⓘStenzelberg, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
12.2km (7.6 miles) ⓘWeilberg (Großer Weilberg), Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
13.5km (8.4 miles) ⓘJungfernberg, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
14.6km (9.1 miles) ⓘHerchenberg quarry, Burgbrohl, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
References
Brauns, Reinhard (1922) Die Mineralien der Niederrheinischen Vulkangebiete - Mit besonderer Berücksichtigung ihrer Bildung und Umbildung. E. Schweizerbart'sche Verlagsbuchhandlung.
 
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