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TOMRA XRT Technology Helps Recover Spectacular 227 Carat Lulo Diamond

The 227 carat Type IIa D-colour stone is the biggest diamond recovered at the large diamond recovery circuit at the Lulo mine to date and Angola’s second largest diamond on record.

17 February 2017

227 ct Lulo diamond
The recent recovery of a 227carat Type IIa premium-quality stone from the Lulo mine in Angola is the latest tale in the success story of TOMRA´s X-ray transmission (XRT) sorting technology.

The diamond is not only the largest single stone to be recovered at the newly commissioned XRT large diamond recovery circuit at Lulo, but it is also Angola’s second largest recorded diamond. The Lulo diamond mine is a successful and long-running partnership between ASX-listed Lucapa Diamond Company Limited (40% owner and operator), Endiama E.P and Rosas & Petalas.

Lucapa Managing Director Stephen Wetherall commented:
“The recovery of the 227 carat diamond using the new XRT circuit justifies our investment in TOMRA´s large diamond recovery technology, which has more than paid for itself with the recovery of this one stone alone.”

“We had already seen what the implementation of this XRT technology delivered for Lucara in Botswana, enabling the recovery of the second largest diamond ever by the Karowe mine, Botswana, in November 2015.”

Geoffrey Madderson, Segment Manager Diamonds at TOMRA Sorting Mining, commented:
“TOMRA’s XRT diamond recovery technology has yielded another diamond of exceptional size and quality, and is proud to have delivered it to the Lucapa-operated Lulo mine in Angola. TOMRA would like to congratulate and thank Lucapa and its Lulo partners for the good cooperation so far and the confidence shown in our technology.”

The Lulo large diamond recovery circuit, including a TOMRA sorting unit, went into commercial operation in the December 2016 Quarter, processing oversize alluvial gravels at the Lulo Diamond Project in Angola. As part of the new coarse recovery stream at the 150 tonne per hour diamond plant, the XRT technology has provided the Lulo partners with the capability to recover individual diamonds up to 1,100 carats. The XRT sorting technology is significantly more effective for the recovery of higher quality low-luminescing Type IIa diamonds.

At the beginning of 2014, TOMRA launched a new range of diamond recovery solutions which out-perform traditional technologies, providing the highest diamond recovery rates at the lowest yields. This enables complex recovery plants to be simplified and streamlined, with the result being lower running costs.