A pleasing specimen of Siderite from the classic Neudorf area in Germany. a specimen once in the Erich Zirkl collection of Wien, Austria. Well formed intergrown rhombic crystals of Siderite measure to 1.6cm on edge, formed over a cavity rich Quartz crystal matrix, with minor metallic grey Bournonite. Crystals of Quartz also preferentially coats some of the Siderite crystal faces. A fine example of Neudorf Siderite.