An alliance between a diamond producer and a diamond manufacturer in Russia is simply inevitable and necessary

What is a diamond manufacturer’s margin composed of? What is the profession of diamond processing engineer about? How much time does it take to become a diamond cutter? How does a polishing factory work? The Russian Cut, is it alive? Lightbox from De...

15 october 2018

High technologies make it possible to create a product that can be obtained in natural stones only for very big money

Andrey Zharkov, having left the position of President at diamond mining company Alrosa, has established and headed the Ultra C company, which will be engaged in the production of diamonds from the reactor. In this interview with industry news agency...

08 october 2018

The once unorganised domestic jewellery sector in India is now growing

A veteran businessman, former Chairman of Gem & Jewellery Council (GJC), Bullion Expert, a third-generation jeweller born with a silver spoon (or was it gold?) in his mouth, a perpetual optimist … yes, the list could go on. As the first...

01 october 2018

India is poised to become a major fine jewellery market in the near future - Pramod Agrawal, Chairman GJEPC

Pramod Kumar Agrawal, the current Chairman of the Gem & Jewellery Export Promotion Council (GJEPC) of India is a successful entrepreneur in his own right. Despite belonging to a jewellery business family, with his father dealing in gemstones...

24 september 2018

Color diamonds are more valuable and desirable and a better investment

In 1993, Eyal Cohen started his career as a diamond cutter, sitting by his father’s side as an apprentice. 4 years later, he was recruited by a jewelry firm, where he learned to appreciate natural colored diamonds. In 2003, Eyal opened his own company...

17 september 2018

Geological enigma of blue diamonds revealed by GIA

02 august 2018

The research published by Gemmological Institute of America says that blue diamonds may get their attractive blue colour due to boron atoms that ancient oceans’ floors contained.

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Blue diamond with inclusions                                                                                                 Image credit: GIA


GIA has been examining 46 type IIb diamonds with inclusions submitted to the lab over two years. According to the research, after studying the inclusions the scientists were able to find the original stone and conclude that such diamonds were formed very deep in the earth at extremely high pressures. The minimal depth for formation of such diamonds was at – 410 km. The diamonds are said to be grown in the ocean crust. Borum is believed to be brought to the lower mantle, where it helped to form diamonds, because of the movements of Earth’s tectonic plates. 
The study is of importance to the industry as it was believed that there were no large gem quality diamonds deep in the earth. This research shows that most large and relatively pure diamonds are superdeep.  
The study will be presented at GIA’s International Gemological Symposium in October.

Victoria Quiri, Rough&Polished