Demand will pick up once the season starts

N Anantha Padmanaban took charge as the Chairman of the All India Gem & Jewellery Domestic Council (GJC) in January 2019. He has immense hopes and confidence in the Indian jewellery sector. His motto is to ‘ensure that after the day’s business...

14 october 2019

Prospects for discovering new diamond deposits in the Arkhangelsk Province are far from exhausted

ALMAZINTECH is engaged in technical auditing and comprehensive assessment of activities performed by exploration, diamond mining and gold mining businesses in Russia and other countries, as well as carries out research and development. It employs highly...

07 october 2019

Botswana Diamonds eyes expansion of Thorny River to include Marsfontein – Campbell

Botswana Diamonds, which has a 40% stake in Thorny River, through Vutomi, said there are plans to expand the project located in South Africa to include Marsfontein once a mining permit for the latter has been awarded. Company managing director James...

30 september 2019

Diamond knife and tender system: The tight-fisted paying twice?

LLC Kristalin is the only company in Russia that manufactures microsurgical diamond blades for domestic healthcare that meet international requirements and are used in ophthalmology, neurosurgery and plastic surgery. Mikhail Zhiltsov, the company’s Deputy...

23 september 2019

Didier Giard: Stiff competition among the diamantaires is one of the factors of the price war

On September 9, 2019, the French Association of Gemmology (l’Association Française de Gemmologie, AFG) held its regular Paris Gemmological Rendez-Vous. Its organizer, Didier Giar, the head of the AFG kindly agreed to answer questions from Rough&Polished...

16 september 2019

Scientists have created a material nearly as hard as diamond

01 october 2019

Scientists from Russia, Germany and Sweden createв the hardest material after diamond, TASS reported with the reference to the press service of the NUST MISIS. According to the scientists who created this material, it does not decompose when pressure and temperature drop.
“Usually materials modified at ultrahigh pressures are not able to retain their properties after extraction from the diamond anvil, but in this case, fellowing experimenters were successful,” the agency quoted Igor Abrikosov from MISIS, one of the authors of the work. “We modeled it on a supercomputer. The calculation results coincided with experimental data and explained the unusual properties of the new material.»
Scientists obtained superhard material by heating the rhenium in a diamond anvil to 1,700 ° C, then compressing it to 900 thousand atmospheres and passing nitrogen through it. After deriving the structure of rhenium pernitride, scientists have found a simpler method for its synthesis - the substance can be obtained using a conventional press, and by replacing pure nitrogen with ammonium azide. In that case, it is enough to compress rhenium by 365 thousand atmospheres.
The report also says that the bulk modulus of elasticity of the new substance is 428 gigapascals, while in diamond this figure is 441 GPa.

Victoria Quiri, Correspondent of the European Bureau, Rough&Polished, Strasbourg