Diamond miner was forecast to hand back cash but says balancing books more important
Gem Diamonds' non-executive chairman added as non-executive director
Harry Kenyon-Slaney joins Sir Roderic Lyne, James Cameron and Damien Hackett
Former Rio Tinto exec Harry Kenyon-Slaney to take job in June
Under the new arrangements, Rio will condense its five core groups into four: aluminium, copper and coal,...