Gem Diamonds has unearthed a 122.20-carat rough diamond from its Letšeng mine in Lesotho, marking the third diamond over 100 carats discovered in the past month and the 11th of its kind this year. The company recovered this high-quality, type II diamond on September 1, following the discovery of a 129.71-carat rough on August 23 and a 145.55-carat stone on August 3. Additional notable finds this year include a 212.49-carat rough in May and two