Gem Diamonds shares on fire as miner finds 910-carat rock

Shares in Africa-focused Gem Diamonds (LON:GEMD) skyrocketed Monday morning after the miner announced the recovery of what it qualified as the fifth biggest gem-quality diamond ever found. The 910-carat, D colour, Type IIa rough diamond was unearthed at the firm's flagship Letšeng mine in Lesotho....