“Only do business with clients who have impeccable integrity,” suggests Davy Blommaert, banker

Davy Blommaert heads the Diamond Business at National Bank of Fujairah, which falls under the bank’s corporate and institutional banking division. With nearly 10 years of experience in the diamond industry, he was tasked to establish a unit within NBF...

18 march 2019

Russia’s export legislation is like a log on the road making it difficult to drive through

Eduard Utkin, General Manager of the Russian Jewellers Guild Association, which is a member of the Russian Federation Chamber of Commerce and Industry, answers the questions from Rough & Polished regarding the activities of the country’s professional...

11 march 2019

Botswana mum on new demands as negotiations with De Beers draw closer

Botswana said it will begin new diamond marketing and sales negotiations with De Beers in June or July this year. Mineral resources minister Eric Molale told Rough & Polished’s Mathew Nyaungwa on the sidelines of a mining conference in Cape Town, South...

04 march 2019

DLX-jewellery will focus more on colour stone designed pieces as well as diamond jewellery sets going forward - Jack Chen, General Manager, DLX-Jewellery

Graduating in International Business from an Institute in Sydney, Australia, in 2015, Jack Chen returned to China to start managing his family-owned jewellery business. Besides holding a certificate in a practical diamond course at Gemological Institute...

25 february 2019

Ali Pastorini: “We have to change a little the way to sell the idea that buying jewelry is just for glamour”

Ali Pastorini is the co-owner of DEL LIMA JEWERLY and President of Mujeres Brillantes, an association which brings together approximately 1000 women working in the gold and diamond trading sector, mainly from Latin America, as well as from Turkey, Spain...

18 february 2019

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.

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