GOLDNET.MARKET - “We want and are working to provide business with the opportunity to develop a lot of activity areas”

Today, almost all jewellery companies have their own wholesale websites, online stores, and social media pages. But a year ago, GOLDNET.MARKET, the first jewellery wholesale marketplace appeared in Russia, a new effective tool for the jewellery market...

20 september 2021

Platinum’s rare nature gives it additional value and appeal

Huw Daniel is the CEO of Platinum Guild International, overseeing market development activities in China, Japan, India and the USA, on behalf of the platinum producers of South Africa. Before taking up this role in 2015, Huw ran PGI USA for 12 years...

13 september 2021

Marco Carniello: We want to continue to be the engine boosting the jewellery industry

Italian Exhibition Group (IEG) is a leader in Italy in the organisation of trade fairs and one of the main operators in the trade fair and conference sector at European level, with structures in Rimini and Vicenza, as well as further sites in...

06 september 2021

There is a significant need for smart and technological financial solutions in the diamond industry

MDPS, the Israeli start-up Fintech company from the Mazalit Group is gearing up to enter the diamond industry soon. Zeev Maimon, the CEO of MDPS is also the Founder / CEO of MAZALIT, a B2B payment platform designed and dedicated to the global diamond...

30 august 2021

The future for synthetics lies in that it has become possible to grow a stone you want and make what you want out of it

Alex Popov, President of the Moscow Diamond Exchange and head of the Âme jewelry brand, which uses lab-grown diamonds to produce jewelry, sat for an interview with Rough&Polished sharing his views on the coexistence of natural and man-made diamonds in...

23 august 2021

AG&J responds to GIA decision to grade LGD with same terminology as natural diamonds

26 october 2020
ag&jlogo.pngAnalytical Gemology and Jewelry (AG&J) head Dusan Simic launched a response to the decision of the GIA to grade laboratory-grown diamonds in what he calls a standardized fashion. “It is also unfortunate that the GIA only made its decision regarding LGDs after the recent publication of the third edition of Laboratory-Grown Diamonds - Information guide to HPHT and CVD-grown diamonds, by myself and Branko Deljanin,” Simic commented. 
“One of the main doubts and discussions that Branko and I had while writing the third edition of our book was precisely how LGDs would be graded in the future,” he said. “While Branko's commitment is to grade them like natural diamonds, which he does in his laboratory, I believe that grading should be different because natural diamonds and LGD are different products.” 
“We waited for the GIA to decide and, unfortunately, they made a decision and published it when our book was already printed. This means that we were not able to comment on it in our book and to present facts in support of our two views. AGJ believes that the GIA’s decision is wrong. It is generally known that the color of CVD grown LGDs is unstable and changes even at relatively low temperatures in jewelry production or repolishing. Indeed, we discussed this very problem with participants at a globally attended webinar with CVD engineer Malay Hirani, co-author of LGD book on October15 during the launch of our new book.”
“Our new research also shows the presence of iron in the surface of polished LGDs. Undoubtedly, this is the due to polishing under increased diamond pressure on the polishing wheel. The structure of the unformed crystal, with many columns that are perpendicular to the table, allows iron doping as well as oil from polishing paste to be absorbed. For now, we do not know how iron will behave over time and how it will affect the color and clarity of the LGD,” Simic concluded.

Alex Shishlo for Rough&Polished