A 1,758-carat diamond that Lucara Diamond Corp. discovered in Botswana has overtaken the famed Lesedi La Rona as the largest rough stone ever found in the country.
The stone was unearthed at the Karowe mine and has been characterized as near-gem, with its quality varying throughout the diamond, Lucara said last week. Portions of it are high-quality white gem, the miner explained.
The company extracted the stone in an unbroken state using technology that it commissioned in 2015. Since then, Lucara has recovered 12 diamonds weighing more than 300 carats, two of which — including this find and the 1,109-carat Lesedi La Rona — were over 1,000 carats. Those stones were both recovered in Karowe’s high-value south lobe.
“Karowe has now produced two diamonds greater than 1,000 carats in just four years, affirming the coarse nature of the resource and the likelihood of recovering additional large, high-quality diamonds in the future, particularly as we mine deeper in the ore body and gain access to the geologically favorable EM/PK(S) unit, the source of both of our record-breaking, 1,000-plus-carat diamonds,” Lucara CEO Eira Thomas added. Source – Rapaport www.diamonds.net