“Exceptionally large clausthalite-rich calcite/dolomite veinlet (partially reddish stained by hematite) forming a typical rubble breccia, partially cemented by clausthalite (grey-metallic) and secondary dolomite (white). Sporadic fracture fillings are pyrite (pale-yellow-metallic). Hans-Jürgen Förster collection, G. Grundmann photo. ”