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


Classification
Species:'Apophyllite Group' (not an IMA approved species)
Formula:AB4[Si8O20]X · 8H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Apophyllite Group data
Locality Data:Click here to view Dungberg (Dungkopf), Unkelbach, Remagen, Ahrweiler, Rhineland-Palatinate, Germany
Data Identifiers
Mindat Occurrence Record ID:406752
Long-form Identifier:1:3:406752:8
GUID (UUID V4):0
Nearest other occurrences of Apophyllite Group
7.7km (4.8 miles) ⓘGierswiese (Gerstwiese), Bad Honnef, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
8.3km (5.1 miles) ⓘMinderberg quarry (Düstemich), Linz am Rhein, Linz am Rhein, Neuwied, Rhineland-Palatinate, Germany
12.2km (7.6 miles) ⓘWeilberg (Großer Weilberg), Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
17.5km (10.9 miles) ⓘLimberger Kopf, Rindhausen, Asbach, Asbach, Neuwied, Rhineland-Palatinate, Germany
17.7km (11.0 miles) ⓘSchellkopf, Brenk, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
26.7km (16.6 miles) ⓘCaspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
46.5km (28.9 miles) ⓘArensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
49.8km (30.9 miles) ⓘFeuerberg, Hohenfels-Essingen, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
50.3km (31.3 miles) ⓘGraulay quarry, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
55.9km (34.8 miles) ⓘEmmelberg, Üdersdorf, Daun, Vulkaneifel, 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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