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Rio Tinto Group engages in exploring, mining, and processing mineral resources worldwide. The company operates through Iron Ore, Aluminium, Copper, and Minerals Segments. The Iron Ore segment engages in the iron ore mining, and salt and gypsum production in Western Australia. The Aluminum segment is involved in bauxite mining; alumina refining; and aluminium smelting. The Copper segment engages in mining and refining of copper, gold, silver, molybdenum, and other by-products and exploration activities. The Minerals segment is involved in mining and processing of borates, titanium dioxide feedstock, and iron concentrate and pellets; diamond mining, sorting, and marketing; and development projects for battery materials, such as lithium. It also owns and operates open pit and underground mines; and refineries, smelters, processing plants and power, and shipping facilities. Rio Tinto Group was founded in 1873 and is headquartered in London, the United Kingdom.

Rift Valley Resources Corp. does not have significant operations. It focuses on acquiring Metrolink Solutions Inc. to manufacture, market, sell, and distribute QwikCom mobile communication units in the United States. The company was incorporated in 2009 and is based in Vancouver, Canada.

Westhaven Gold Corp., a junior exploration company, engages in the acquisition, exploration, and development of resource properties in Canada. The company primarily explores for gold and silver deposits. The company was formerly known as Westhaven Ventures Inc. and changed its name to Westhaven Gold Corp. in June 2020. Westhaven Gold Corp. was incorporated in 1998 and is headquartered in Vancouver, Canada.