Gem Diamonds has unearthed a 113-carat rough from its Letšeng mine in Lesotho, the third over 100 carats this year. The miner discovered the high-quality, type IIa diamond on February 17, it said Monday. On January 17, the company retrieved a low-quality, 139-carat diamond from the site, and on January 8, it found a high-value, 295-carat, white, type IIa rough. The recovery of three 100-plus-carat diamonds so early in the year is a boon for
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