Miner Finds 442-Carat Diamond That May Be Worth $18 Million

442-Carat Diamond

A small diamond miner that has dug some of the world’s most valuable gems from a mountainous African kingdom has found another huge stone. Gem Diamonds Ltd. said Friday it had an unearthed a 442-carat diamond at its Letseng mine in Lesotho. While it’s hard to establish a price for such stones before cutters can evaluate them, … Read more

Origin of British Crown Jewels’ diamond revealed

Queen Elizabeth the II British Crown Jewels

The famous Cullinan diamond, which is now the centrepiece of the British Crown Jewels, likely originated in Earth’s lower mantle, right beneath the rigid and stable continental plates, where the mantle is slowly moving or convecting. The finding is part of ongoing research carried out by Evan Smith and Wuyi Wang at the Gemological Institute … Read more

Big-Stone Recoveries Return as Letšeng Reopens

Gem Diamonds new large rough diamond recoveries

Gem Diamonds has recovered a number of large, high-quality stones at its Letšeng mine in Lesotho, all found in the first week after production resumed following the COVID-19 lockdown. They include a 60-carat, light-yellow, type I diamond, and three D-color, white, type II diamonds weighing 87, 66 and 23 carats, the company said Monday. It … Read more