Zimnisky: Hard to protect lab-diamond price as production methods, economics improve

Paul Zimnisky, an independent diamond industry analyst and consultant, said it will be very difficult for the lab-diamond manufactures to protect price as production processes and economics improve. He told Rough & Polished’s Mathew Nyaungwa in an exclusive...


James Campbell: Scoping study results for SA’s Thorny River due mid-year

Botswana Diamonds appeared to have expended most of its energy and resources last year on the new Thorny River project in South Africa as its Sunland Minerals joint venture with Alrosa, in Botswana takes long to find diamonds despite significant effort...

16 april 2018

MGCJ founder Branko Deljanin: Production of synthetic diamonds is still larger than consumption

Founder and Chairman of the Mediterranean Gemmological and Jewellery Conference, MGJC, Branko Deljanin kindly agreed to answer questions from Rough&Polished related to synthetic diamonds and the upcoming 4th session MGJC in May in Budva, Montenegro.

09 april 2018

There is some magic in a diamond

Alexander Gorynya is a Director General of the St. Petersburg-based Kongo jewellery company. He is a Chairman of the Union of North-West Jewellers. In 1978, he graduated from the North-Western Extramural Polytechnic University. Since 1983, he worked...

02 april 2018

Looking for the Kimberley Process achieving further and meaningful sustainable progress

On March 7, 2018, the United Nations General Assembly welcomed the progress made by the Kimberley Process Certification Scheme to break links between the diamond trade and conflict and adopted a consensus resolution aimed at intensifying that work aligning...

26 march 2018

Tsodilo recovers 101 diamonds at BK16 project

16 april 2018
Tsodilo Resources said it recovered 101 diamonds, representing 18.571 carats from samples by an independent diamond classifier, at its BK16 kimberlite project in Botswana.
The stones were recovered following the sorting of the first X-ray concentrate samples from both the large diameter drilling (LDD) samples and the historical tailings samples which were used for commissioning and calibrating the dense media separation (DMS) plant, it said.
The X-ray sorter machine, which commissioned earlier this year, had to date sorted 56 of the drilled out concentrate samples, representing 925 kg of (DMS) concentrate.
The diamondiferous BK16 kimberlite pipe was about 6 hectares in size at surface and was also known to contain rare and valuable Type IIa diamonds.
Tsodilo said the stones recovered so far were similar in appearance to those diamonds that had been recovered from previous operations which were all classified as D, E and F colours with a high percentage of Type II stones.
Final diamond counts and initial weights would be compiled once all samples had been processed, sorted, and a thorough tailings re-treatment audit had been carried out, it said.

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


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