Modern Mining

Canada’s Lucara Diamond Corp has announced the recovery of a 1 758-carat diamond from its 100 %-owned Karowe diamond mine located in the Orapa Kimberlite Field in Botswana.

The 1 758 carat diamond recovered at Karowe

The 1 758-carat diamond recovered at Karowe.

One of the largest diamonds in recorded history, the largest diamond recovered in Botswana, and the largest diamond to be mined at Karowe to date, the unbroken stone was recovered through Lucara’s state-of-the-art XRT circuit, commissioned in April 2015. Weighing close to 352 grams and measuring 83 mm x 62 mm x 46 mm, the diamond has been characterised as near gem of variable quality, including domains of high-quality white gem.

Since commissioning of the XRT circuit in 2015, a total of 12 diamonds in excess of 300 carats have been recovered at Karowe, including two greater than 1 000 carats, from a total production of approximately 1,4 million carats. Of the twelve +300 carat diamonds recovered, 50 % were categorised as gem quality with 11 sold to date generating revenue in excess of US$158 million.

XRT machines at Karowe

XRT machines at Karowe.

Eira Thomas, Lucara’s CEO commented: “Lucara’s technologically advanced, XRT diamond recovery circuit has once again delivered historic results. 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 orebody and gain access to the geologically favourable EM/PK(S) unit, the source of both of our record breaking, +1 000 carat diamonds.”

Photos courtesy of Lucara

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