Rio Tinto Ltd. engages in finding, mining and processing mineral resources. It operates through following segments: Iron Ore, Aluminium, Copper and Minerals. The Iron ore segment engages in iron ore mining and salt and gypsum production in Western Australia. The Aluminium segment engages in bauxite mining; alumina refining; aluminium smelting. The Copper segment engages in mining and refining of copper, gold, silver, molybdenum and other by-products. The Minerals segment engages in businesses with products such as borates, titanium dioxide feedstock and also includes diamond mining, sorting and marketing. The company was founded on December 17, 1959 and is headquartered in Melbourne, Australia.