Pyrite (Var: Bravoite), Pyrite, Sphalerite, Marcasite
Maubacher Bleiberg, Hürtgenwald, Düren, Cologne, North Rhine-Westphalia, Germany
Flotation concentrate of bravoite (brownish), pyrite (pale-yellow), marcasite (greenish-yellow), and sphalerite (grey). The grains of the flotation concentrate have been embedded in epoxid-resin. The bravoite shows variations in micro-structure with distinct differences in the width, color tones, and the outward terminations of the zones, as well ...
© Günter Grundmann, Detmold