Lucapa to become a niche diamond company, says Wetherall

Lucapa Diamond believes that it will become the only company in the world with multiple diamond mining operations whose average diamond value is in excess of $1,000 per carat, once the Mothae mine is commissioned this year. Company chief executive and...

19 february 2018

Zimnisky: Diamonds lack fungibility to be a major investment product

Physical diamonds will never be a viable widespread investment product simply because they inherently lack fungibility, meaning they are all unique, according to Paul Zimnisky, an independent diamond industry analyst and consultant, who is based in New...

12 february 2018

Julien-Vincent Brunie: "Being surrounded by beauty and art is a privilege!"

This last December, shortly before Christmas, the Auction House of Christie's arranged a private display of jewelry in Moscow. The correspondent of Rough & Polished, who had an opportunity to visit this event, was able to admire a luxurious collection...

05 february 2018

Ali Pastorini: We would like meeting Mujeres Brillantes 2018 to be held in Russia

Ali Pastorini is the co-owner of DEL LIMA JEWERLY and President of Mujeres Brillantes, an association which brings together approximately 500 women working in the gold and diamond trading sector, mainly from Latin America, as well as from Turkey, Spain...

29 january 2018

Diamond Exchanges promote healthy development of the diamond industry, besides safe and basic infrastructures for diamond trade

Prior to joining the Guangzhou Diamond Exchange, Liang Weizhang served as a civil servant of Guangdong Entry-Exit Inspection & Quarantine Bureau as the director of the Kimberley Process Office. He participated in the KP Review missions to South Africa...

22 january 2018

Lucara improves diamond recovery method

13 september 2017
Lucara Diamond said it is in the final stages of commissioning the Mega Diamond Recovery (MDR) and new Sub-Middles XRT circuit in the Karowe plant, in Botswana.
“This is an area where the company is again setting the groundwork for a paradigm shift in the way diamonds are recovered, replacing the dense medium separation (DMS) plant and entire recovery process with a single machine,” Company chief executive William Lamb was quoted as saying by Mining Journal.
“One of the characteristics of the south lobe ore is the density of the kimberlite material.
“The XRT technology will allow us to continue to process material at the plant’s original design throughput with minimal capital expenditure versus installing additional DMS capacity and an enormous recovery plant to handle the concentrate.”
He said the Sub-Middles XRT circuit was primarily, along with the already installed XRT machines, responsible for the ore characteristics.
“The MDR, however, is as early as possible in the process flowsheet – in fact, directly after the primary crusher. Material from around 45mm up to 120mm is screened off for processing through the new MDR XRT circuit,” said Lamb.
“This system is designed for up-front value recovery. Prior to the large diamonds produced by the south lobe being exposed to areas where they could be potentially broken, we aim to recover them as soon as possible, thus preserving the value.”
Mining Journal also reported that Lucara was investing “heavily” in exploration and material testing at depth to secure Karowe’s future beyond the projected 2026 end of openpit extraction, and below the 320m pit plan.
It currently had an inferred resource of about 4Mct below the 6.3Mct reserve to 400m.

Mathew Nyaungwa, Editor in Chief of the African Bureau, Rough&Polished


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