“I am bullish on the future of the diamond business. Three reasons for this optimism... new discoveries, extending mine life and the increasing demand for diamonds”, says Martin Leake

Martin Leake is a PhD exploration geologist and Six Sigma black belt who has been involved in the rough diamond market since 2004. He worked for BHP Billiton for 22 years and recently left Grib Diamonds where he helped set up a world-class marketing...

18 september 2017

Diamond exploration junior obtained conclusive proof of diamond-bearing kimberlites in Russia’s North

OOO Proex Service, which is searching for diamonds in the Arkhangelsk Region of Russia, discovered seven kimberlite pipes in the Kozolsky license area having spent 15 months for the find. One of the pipes is very similar to the highly diamondiferous...

11 september 2017

People do not just make fun in the social media, they make purchases there

Oksana Senatorova has been famous in the jewellery world for a long time as a publisher of the ‘Navigator in the Jewellery Trade’ journal, organizer of the international contest ‘The Best Jewellery Store of the Year’, curator of professional events and...

04 september 2017

‘There is no illegal tanzanite mining in Tanzania’

Richland Resources, which wholly-owned TanzaniteOne until the Tanzanian government forced it to relinquish half of its stake to the State Mining Corporation (STAMICO), exited the country in 2015 to focus on its operations in Australia. The formalisation...

28 august 2017

David Block: “Intellectual property theft is not just Sarine's problem...whole industry should combat this phenomenon.”

For more than 15 years, David Block served in various senior positions at Sarine Technologies in Israel and India. From 2012 until his appointment as CEO in 2017, Block was Sarine's Deputy CEO and Chief Operating Officer, with responsibility for...

21 august 2017

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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