The Grib Diamond Mine: Geology, Ecology and Industrial Safety

Gennady Piven, First Deputy General Manager of AGD Diamonds JSC, talks about his work at the diamond fields in Yakutia and in the Arkhangelsk Province.

10 december 2018

I have a dream to see India become a world leader in high-end jewellery manufacturing - Sanjay Kothari

An industry leader who needs no introduction to the gem and jewellery industry is Sanjay Kothari…the former chairman of the GJEPC of India has held various positions in the Council including being Convener-Exhibitions for many years before becoming Convener-Promotions...

03 december 2018

Style always reflects culture

Reena Ahluwalia is a multifaceted artist …an award-winning jewelry designer, diamond painter, professor, speaker and a community builder and more. Recognized as one of the Top Masters of Jewelry Design and art in Canada, she has been creating jewelry...

26 november 2018

Botswana Diamonds’ Campbell on Alrosa exit: no exploration JV lasts forever

Botswana Diamonds is currently in talks with a major diamond producer interested in taking over a stake in Sunland Minerals previously owned by Alrosa. The Sunland joint venture was established in 2014 to test existing Alrosa exploration technology on...

19 november 2018

If real gems are replaced by artificial stones, it is not the difference in value that sellers may cheat you out, but the very idea that you are to obtain along with a jewelry piece made from a genuine stone

Elena Titova is the Director of the All-Russian Decorative Art Museum. The museum, which she heads, was founded fairly recently (less than 40 years ago), but it is one of the most popular and stylish museums of Moscow, famous, among other things...

12 november 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