Ellah Muchemwa: ADPA to launch Africa's first diamond mining standard next year

The African Diamond Producers Association (ADPA), which is based in Luanda, Angola, and represents the interests of mainly African diamond producers and those with the potential to produce diamonds, will next year launch the Sustainable Development...

04 november 2024

Dmitry Fedorov: I want our jewelry to be displayed at a museum in the future

Dmitry Fedorov is the founder of the eponymous jewelry house. His main focus is the creation of Orthodox-inspired premium luxury jewelry of high artistic merit. He told Rough&Polished about his journey in the jewelry industry, about choosing the ‘Orthodox...

28 october 2024

Responsible business practices ‘no longer optional’, says WDC President Feriel Zerouki

The president of the World Diamond Council takes time out of her busy schedule to tell Rough&Polished readers about the critical work of the WDC. Zerouki, the first female present of the body, which includes all the important industry organizations among...

14 october 2024

James Campbell: Botswana Diamonds optimistic as it enters uncharted territory of using AI for mineral exploration

London-listed Botswana Diamonds has expressed optimism about the company’s use of artificial intelligence (AI) to scan the exploration database in Botswana to look for new mineralised deposits. Company managing director James Campbell told Rough...

07 october 2024

Artur Salyakayev: For me, happiness is freedom to make my ideas happen and create valuable products

Artur Salyakayev is an art entrepreneur, founder of the International Jewelry Academy (IJA) and the INCRUA jewelry company. He has initiated and developed successful projects in jewelry industry and services sector. He is also a leading expert...

30 september 2024

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