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Bergbaumuseum Ibbenbueren Anthrazit . en Anthracite on display in the Ibbenbren Mining Museum Bergbaumuseum Ibbenbren in Ibbenbren Kreis Steinfurt North RhineWestphalia Germany Picture taken with permission de Anthrazitkohle mit Pyrit und sekundrem Schwefel aus dem Ostfeld des Ibbenbrener Kohlereviers im Bergbaumuseum Ibbenbren in