RAPAPORT... Gem Diamonds has unearthed a 357-carat diamond at its Let??engmine in Lesotho, it said in a Twitter post Monday. The light-brown stone, which the miner said is of "highquality," is the 13th rough diamond over 100 carats the company has found thisyear. It's the second-largest it has recovered in 2018, after the 910-caratLesotho Legend it found in January. That stone - which the company claims to be the fifth-largestrough diamond in history - sold for $40 million in March. Gem Diamonds owns 70% of the Let??eng asset, with thegovernment of Lesotho holding the remaining 30%. Image: The 357-carat light-brown diamond. (Gem Diamonds)