St Barbara Limited, together with its subsidiaries, engages in the exploration, development, mining, and sale of gold. It operates through two segments, Leonora Operations and Simberi Operations. The company primarily explores for gold, silver, and copper-gold porphyry deposits. Its properties include the Gwalia underground mine located in Leonora, Western Australia; and the Simberi gold mine located in New Ireland province, Papua New Guinea. St Barbara Limited was incorporated in 1969 and is based in Melbourne, Australia.