Stordø Kisgruber was a Norwegian mining company which operated the pyrite mines in Litlabø at Stord in Hordaland, Norway. Mining for pyrite at Litlabø had first been established in 1865. Stordø Kisgruber A/S was established in 1907 and maintained mining operations which ended in 1968. A total of about eight million tons of ore was won during the operation of the mine. Under the elevator tower is the main mine shaft which went straight down about 750 meters deep. Altogether there are 80 km of shafts into the mountain. A railway line operated between Litlabø and the quays at Sagvåg.