How aesthetic and typical that piece is. A superb specimen, consisting of countless roman-sword-shaped crystals of brassy Marcasite from the well known (Zeche) Friedrich der Große coal mine near Herne in North Rhine Westphalia. Here we have these unique shaped crystals with high metallic sheen and almost superb terminations. This specimen has great aesthetics and is definitely much better in kind due to the fact, that the pictures can´t convey the great brassy metallic sheen. One side has minor imperfections.