Any color diamond is a great investment

Bruno Scarselli belongs to the 3rd generation of the Scarselli family, which has for the last half-century been producing and selling some of the world’s highest quality yellow, blue and pink diamonds available on the market. Bruno heads the company...

20 november 2017

It’s crucial everybody feels confident that their suppliers use the System of Warranties - Stephane Fischler

The System of Warranties (SoW) in the diamond industry dates back to 2002, when the World Diamond Council (WDC) in team with the World Federation of Diamond Bourses (WFDB) and the International Diamond Manufacturers Association...

13 november 2017

IIDGR’s proprietary technology gives polished diamonds unique identity

The International Institute of Diamond Grading & Research (IIDGR), a unit of the global diamond giant, De Beers, grades natural stones and is also using its proprietary inscription technology to inscribe a unique identification on tables of each...

07 november 2017

In future, only those who offer innovative designs will survive

A science graduate from Madras University, Srinivasan's one-man venture with just 10 employees launched in 1984 has now grown into the present Emerald Group, in about 3 plus decades. The Group from Southern India is one of the largest jewellery manufacturing...

30 october 2017

Conditions are still very difficult - Ernie Blom

Ernie Blom, the President of the World Federation of Diamond Bourses (WFDB) for the third term, has served on a range of industry bodies as an executive as well as chairman for many years, including Chairman, Diamond Dealers Club of South Africa...

23 october 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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