Galena and Quartz, Nantiera. (CWO)

Galena and Quartz, Nantiera. (CWO)

Galena, PbS, and Quartz, SiO2. Nantiera mine, Central Wales Orefield. Broken galena crystals in a bed of druzy quartz, deposited in a fractured host rock. There are also minor amounts of chalcopyrite.