The mine could supply up to 10% of world demand for neodymium and praseodymium, used in the manufacture of magnets for wind turbines, and electric vehicles.
The mining cycle turned two years ago – gains for the sector's largest companies have far outpaced stocks like Apple, Amazon, Google and Facebook since.
Vale and BHP Billiton in talks over future of their Samarco iron-ore joint venture, including the possibility of the Brazilian miner taking full ownership.
Markets where technology hasn’t substantially shortened the supply cycle and where cost are rising (ie copper) have the greatest long-term upside in prices