Rio Tinto Plc engages in the exploration, mining, and processing of mineral resources. It operates through the following business segments: Iron Ore, Aluminium and Lithium, and Copper. The Iron Ore segment supplies iron ore mining and salt and gypsum production. The Aluminium and Lithium segment produces bauxite, alumina and primary aluminum. The Copper segment offers gold, silver, molybdenum and other by-products. The company was founded in 1873 and is headquartered in London, the United Kingdom.