Viridis Mining and Minerals Ltd (ASX:VMM) has described the maiden mixed rare earth carbonate (MREC) product from its Colossus project in Brazil as delivering ‘world class’ recoveries, including high grades of praseodymium, neodymium, dysprosium and terbium, together with overall MREO (magnetic rare earth oxide) recoveries (from ore to MREC) of 76%. These results follow a work program run by the Australian Nuclear Science and Technology Organisation (ANSTO) for Viridis, which confirmed and optimised conditions for a flowsheet design which produces an MREC product from a clay bulk composite fro…