<prompt> Ukuqala ngawo-1880 iBlack Diamond kwakuyindawo yezimayini zamalahle yasemaphandleni.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yomusho ithi Ekuqaleni kwawo-1880 iBlack Diamond kwakuyindawo yezimayini zamalahle yasemakhaya, eyakhiwa yiBlack Diamond Coal Mining Company yaseCalifornia, eyayingumnikazi futhi isebenza emayini. 