| Classification |
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| Species: | Chalcocite |
| Formula: | Cu2S |
| Confirmation |
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| Validity: | Believed Valid |
| References |
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| References: | Blaß, G. & Kruijen, F. (2013): Die Mineralogischen Neuigkeiten aus der Vulkaneifel. Mineralien-Welt 24 (3), 33-41. |
| Data |
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| Mineral Data: | Click here to view Chalcocite data |
| Locality Data: | Click here to view Graulay (Graulai; Graulei; Grauley), Hillesheim, Vulkaneifel, Rhineland-Palatinate, Germany |
| Nearest other occurrences of Chalcocite |
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| 17.1km (10.6 miles) | | ⓘEmmelberg, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany |
| 21.1km (13.1 miles) | | ⓘSilberberg Mine, Schmidtheim, Blankenheim, Euskirchen, Cologne, North Rhine-Westphalia, Germany |
| 26.2km (16.3 miles) | | ⓘBertha shaft, Neue Hoffnung Mine, Bleialf, Prüm, Bitburg-Prüm, Rhineland-Palatinate, Germany |
| 31.6km (19.7 miles) | | ⓘNeu Glück Mine, Willwerscheid, Traben-Trarbach, Bernkastel-Wittlich, Rhineland-Palatinate, Germany |
| 31.6km (19.7 miles) | | ⓘCopper smelter slag locality, Kall, Mechernich, Euskirchen, Cologne, North Rhine-Westphalia, Germany |
| 40.6km (25.2 miles) | | ⓘE-2011, Bellerberg volcano, Ettringen, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany |
| 40.6km (25.2 miles) | | ⓘBellerberg volcano, Ettringen, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany |
| 47.4km (29.5 miles) | | ⓘFuchsberg quarry, Piesport, Bernkastel-Kues, Bernkastel-Wittlich, Rhineland-Palatinate, Germany |
| 48.9km (30.4 miles) | | ⓘHerzogenhügel (Hertogenwald; La Helle), Ternell, Eupen, Liège, Wallonia, Belgium |
| 50.0km (31.1 miles) | | ⓘStolzembourg Copper Mine, Stolzembourg, Putscheid commune, Vianden, Diekirch District, Luxembourg |