"However, current large-diamond recovery technology still has its limits. Breakage during processing has been an ongoing challenge for LSE-listed Gem Diamonds, owner of the Letšeng mine, in Lesotho, another primary source of the world's large diamonds. During the company's most recent analyst call in August, management gave average-price-per-carat guidance that included a breakage rate of 80%, saying that while ameliorating breakage has been a priority, the results have been disappointing due to the limitations of current technology," Zimnisky pointed out.