(IDEX Online) - Gem Diamonds recovered two huge diamonds - 245-carat and 102-carat - on the same day from its Letseng mine, in Lesotho.The London-based miner said both stones were high-quality Type II, and were recovered on Friday (15 October).Earlier this year Gem, which owns 70 per cent of the mine, found a couple of even bigger stones - 370-carat and 254-carat - within six days. They were also high-quality Type II.Before these finds the last major discovery was 126.9-carat type II diamond back in January.Letseng is the highest dollar per carat kimberlite diamond mine in the world, achieving an average of $1,908 per carat in 2020. Its highest per carat value for a white rough diamond during that year was $38,827. Pic shows the 245-ct diamond