Calcite
Binsfeldhammer lead smelter slag locality, Stolberg, Aachen, Cologne, North Rhine-Westphalia, Germany
Crystallized Calcite very commonly found in this location, often with highly weathered/oxidized surface. Large boulders lying throughout the quarry contain sometimes quarz and calcite veins. Location is easily accessable by a footpath although entry is not recommended (natural reserve).
© Timon Gasterich