Rio Tinto Group engages in finding, mining, and processing mineral resources worldwide. The company offers aluminum, silver, molybdenum, copper, diamonds, gold, borates, titanium dioxide, salt, iron ore, and uranium. It is also involved in the alumina production; primary aluminum smelting; bauxite mining; alumina refining; and ilmenite, rutile, and zircon mining, as well as provision of gypsum. Rio Tinto Group was founded in 1873 and is headquartered in London, the United Kingdom.