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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Aegirine from
Perlenhardt, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany


Classification
Species:Aegirine
Formula:NaFe3+Si2O6
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Aegirine data
Locality Data:Click here to view Perlenhardt, Königswinter, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
Data Identifiers
Mindat Occurrence Record ID:406704
Long-form Identifier:1:3:406704:7
GUID (UUID V4):0
Nearest other occurrences of Aegirine
11.0km (6.9 miles) ⓘHohenberg quarries, Berkum, Wachtberg, Rhein-Sieg-Kreis, Cologne, North Rhine-Westphalia, Germany
28.0km (17.4 miles) ⓘSchellkopf, Brenk, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
35.9km (22.3 miles) ⓘCaspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
37.8km (23.5 miles) ⓘXenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
38.0km (23.6 miles) ⓘXenolith CS-090 (Hopmannite type locality), Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
66.1km (41.1 miles) ⓘRother Kopf, Roth, Gerolstein, Gerolstein, 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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