Galena with quartz, Aberdaunant.  (CWO)

Galena with quartz, Aberdaunant. (CWO)

Galena, PbS, and Quartz, SiO2. Aberdaunant mine, Nr. Llanidloes, Central Wales Orefield. Collected from spoil heaps at the mine, these specimens are a galena- quartz breccia The quartz is massive with no sign of crystals. The galena is also massive with just a small indication of a few small broken crystals, which display the natural cleavage planes. As is often the case in this area, some of the exposed broken surfaces have a bright blue sheen.