The London based Miner, Gem Diamonds shared on Wednesday to have discovered a 152-carat rough diamond from its Letšeng mine in Lesotho.
The rough diamond is a colorless stone and type IIa. This large discovery is the 6th diamond since the start of 2018 that is larger than 100 carats. In January, the miner found a 910-carat rough gem, which is claimed to be the world’s 5th largest rough diamond.
Focus on breaking fewer diamonds
CEO Clifford Elphick answered the question if there was any specific reason for the marked increase in large diamond recoveries, saying they are “incredibly focused on this sort of diamond recovery. In addition, we are looking for these stones and try and recover them while breaking fewer diamonds. There is no ‘magic bullet’. I cannot point to one specific thing we are doing differently.”
Gem Diamonds works with three XRT diamond sorting machines [Tomra’s X-ray transmission], and is testing a pilot plant in the attempt to solve the issue that happens more often in the diamond market – the diamond breakage at the crushing stage of the recovery process, which results in the potential loss of large diamonds.