Rio Tinto Plc ADR. Replay the stock market charts of RIO day by day back to 2003. Open long and short positions without spending any money. Rio Tinto PLC is a mining and exploration company. It discovers, mines, processes and supplies metals and minerals used in everyday modern life. Its main products include Bauxite, Alumina, Copper, Gold, Molybdenum, Silver, Nickel, and Diamonds.