The entrance to the Nakhlak mine. When I visited the mine in 1977 it was still producing lead ore which was hand sorted. It was a teaching mine for the school of mines. The students were divided into groups. One week a group would do drilling and blasting, the next they might work on timbering, the next ore hauling or ventilation etc. There was a place in the mine where you could look up a cleft in the ceiling that was lined as far as your light could see with small sharp crystals of cerussite. I noticed that the floor of the stope that I was standing in was composed of about 10% crushed cerussite crystals.