Rio Tinto plc is a United Kingdom-based mining and metals company. The Company is principally engaged in the production of materials essential to human progress. The Company's segments include Iron Ore, Aluminium, Copper and Minerals. The Company operates an integrated portfolio of Iron Ore assets, which includes a network of 17 mines, four independent port terminals, and a rail network spanning approximately 2,000 kilometers. The Aluminium business includes bauxite mines, alumina refineries and aluminum smelters. Its bauxite mines are located in Australia, Brazil and Guinea. The Copper segment is engaged in mining and refining copper, gold, silver, molybdenum and other by-products; exploration activities together with the Simandou iron ore project. The Minerals segment includes businesses with products, such as borates, titanium dioxide feedstock together with the Iron Ore Company of Canada. Its business also includes diamond mining, sorting and marketing, and lithium exploration.