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Cordierite from
Petersberg, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany

Classification
Species:Cordierite
Formula:(Mg,Fe)2Al3(AlSi5O18)
Confirmation
Validity:Believed Valid
References
References:Brauns, R., (1922): Die Mineralien der Niederrheinischen Vulkangebiete, Schweizerbart, Stuttgart
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Petersberg, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
Nearest other occurrences of Cordierite
1.3km (0.8 miles) A Stenzelberg, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
2.3km (1.4 miles) B Wolkenburg, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
2.7km (1.7 miles) C Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
3.0km (1.9 miles) D Ölberg (Oelberg), Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
4.0km (2.5 miles) E Lyngsberg (Lühnsberg; Lünsberg), Bad Godesberg, Bonn, Siebengebirge, North Rhine-Westphalia, Germany
4.4km (2.8 miles) F Perlenhardt, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany
7.2km (4.5 miles) G Finkenberg, Bonn, Siebengebirge, North Rhine-Westphalia, Germany
24.7km (15.3 miles) H Herchenberg, Burgbrohl, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
28.8km (17.9 miles) I Hüttenberg, Glees, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
29.7km (18.5 miles) J Gleeser Felder, Glees, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
30.3km (18.9 miles) K Nickenicher Sattel (Eicher Sattel), Nickenich, Andernach, Mayen-Koblenz, Rhineland-Palatinate, Germany
30.6km (19.0 miles) L Kappiger Ley (Kappiger Lay), Wehr, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
31.6km (19.6 miles) M Rothenberg, Bell, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
32.9km (20.4 miles) N Nickenicher Weinberg (Nickenicher Sattelberg), Nickenich, Andernach, Mayen-Koblenz, Rhineland-Palatinate, Germany
33.1km (20.6 miles) O In den Dellen quarries, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
33.2km (20.7 miles) P Pumice quarries, Wingertsberg, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
33.5km (20.8 miles) Q Krufter Ofen, Kruft, Pellenz, Mayen-Koblenz, Rhineland-Palatinate, Germany
34.3km (21.3 miles) R Thelenberg, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
34.5km (21.5 miles) S Basalt quarries, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
37.5km (23.3 miles) T Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
38.6km (24.0 miles) U Wannenköpfe Quarry, Ochtendung, Maifeld, Mayen-Koblenz, Rhineland-Palatinate, Germany
41.2km (25.6 miles) V Niveligsberg, Drees, Kelberg, Vulkaneifel, Rhineland-Palatinate, Germany
45.6km (28.4 miles) W Bocksberg, Müllenbach, Kelberg, Vulkaneifel, Rhineland-Palatinate, Germany
53.5km (33.3 miles) X Radersberg, Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
56.7km (35.2 miles) Y Kahlenberg, Zilsdorf, Hillesheim, Vulkaneifel, Rhineland-Palatinate, Germany
61.0km (37.9 miles) Z Auf Dickel (incl. Nonnental), Rockeskyll volcanic complex, Rockeskyll, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
64.3km (39.9 miles) 0 Kahlenberg (Auf'm Kopp; Kallenberg), Oberstadtfeld, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
64.4km (40.0 miles) 1 Rother Kopf, Roth, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
66.3km (41.2 miles) 2 Emmelberg, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
134.2km (83.4 miles) 3 Schaumberg, Tholey, St Wendel, Saarland, Germany
149.8km (93.1 miles) 4 Linck marble works, Hochstädten, Bensheim, Odenwald, Hesse, Germany
188.5km (117.2 miles) 5 Michelsberg Quarry, Katzenbuckel, Eberbach, Odenwald, Baden-Württemberg, Germany
Mineral and/or Locality  
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