RAPAPORT... Gem Diamonds has recovered an additional two large, high-quality diamonds from its Let??eng mine in Lesotho.An "exceptional" quality, 166-carat, type II diamond was unearthed last week, the same day the company found a yellow diamond weighing 77 carats, the miner said Monday. The 166-carat stone is the 12th over 100 carats Gem Diamonds has recovered this year.Earlier this month the miner unearthed a 162-carat, white diamond, and a 143-carat, type II stone at Let??eng. It also found a 442-carat, type II diamond on August 23, which it claimed was one of the largest gem-quality rough diamonds found this year.Image: The 166-carat white and 77-carat yellow diamonds. (Gem Diamonds)