Unifying role is the main objective of the National Gemological Association

Yuri Shelementiev runs the Gemological Centre (GC) at the Moscow State University and is a president of the National Gemological Association (NGA) uniting the gemologists of Russia. The head of the MSU’ GC and the NGA answered the R&P’s...


“Our goal is to bring clarity to the offering of Lab Grown Diamonds”, asserts Chris Casey, President, Lab Grown Diamond Council

Chris Casey is a 15-year veteran of the diamond and jewelry industry.  Chris also has extensive experience in market research as Founding Managing Director of the NPD Diamond and Diamond Jewelry Service where his responsibility included the...

08 july 2019

Dr. Michael S. Krzemnicki: Our dedication to scientific research is an important foundation to our expertise

Dr. Michael S. Krzemnicki, PhD, Director of the Swiss Gemmological Institute SSEF, in an interview with R&P told about the activities and plans of one of the world's leading Gemological laboratories specializing in scientific research of diamonds...

01 july 2019

“Lab-Grown Diamonds is probably the biggest scam this industry has ever seen,”: Leibish Polnauer, Founder-President, Leibish & Co.

An interesting story from the Leibish & Co takes you way back to the year 1979 when young Leibish Polnauer, then a diamond polisher, was travelling to London, having just found out that the factory at which he worked had been shut down. He found an advertisement...

24 june 2019

Botswana mining industry players speak on speculative exploration licences

Speculative mineral exploration licences was a recurring theme from presentations made by three players in Botswana mining industry at a conference convened in Gaborone. The country has issued thousands of exploration licences, across the mining industry...

17 june 2019

Tongo’s peak annual output of 260k ct in year 5 – Newfield

14 may 2019

Newfield Resources, which completed a front-end engineering design (FEED) study, said a reserve model has forecasted an initial eight-year life for Tongo Mine, in Sierra Leone with peak annual diamond production of 260,000 carats.
The peak output would be realised in the fifth year of production, it said.
The average realised price would be $222/ct and forecast unit opex of $115/ct. 
“The very high-grade and high-value diamonds of the Tongo kimberlites, combined with the considerable process and support infrastructure already on site are key drivers of the strong forecast margins and short lead time to first diamond production,” said Newfield executive director Karl Smithson.
The study also found initial probable reserve of 1.1 million carats from the shallow zones of Kundu and Lando kimberlites.
First production diamonds from Kundu and Lando are scheduled to be realised within 12 months of the decline development commencing.
There are a further nine kimberlites located within the Tongo Mine development licence area and two of these already had defined indicated and inferred resources.
The other seven were all highly prospective for significant diamond deposition.  

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