RAPAPORT... Gem Diamonds received a New Year's surprise, retrieving a 146.9-carat rough diamond from its Let??eng mine in Lesotho.The miner found the high-quality, type II diamond on January 7, it said last week. The stone is the first 100-carat-plus diamond the company has found this year. The discovery also comes a month earlier than 2020's first recovery of a stone in that size category, which was a 183-carat, type IIa diamond unearthed on February 3.Last year, Gem Diamonds reported the recovery of 16 diamonds over 100 carats.Image: The 146.9-carat diamond. (Gem Diamonds)