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Fura Gems tempting India with rubies from Mozambique and emeralds from Colombia

A qualified Chartered Account, Dev Shetty heads Fura Gems Inc as President and CEO, who has recently developed world’s largest emerald mine in Zambia and world’s largest ruby mine in Mozambique. Dev started his career in India but moved to the UK in...

15 january 2018

The Exchange plays a significant role in the global jewellery industry - Li Zhiwei, General Manager, GDGJE

Li Zhiwei, has been engaged in the Gems and Jewellery development management in China’s government department for the past 30 years. He served as Vice Chairman of Gems and Jewelry Association of China for more than 10 years and has effectively pushed...

09 january 2018

Yoram Dvash Hits The Ground Running As Second Term Begins

Having completed his first term in office as President of the Israel Diamond Exchange (IDE), Yoram Dvash sat down with Rough & Polished to discuss his achievements during his first period in office, and plans for the second term following his...

04 january 2018

Eurasian Diamond Center should bring profit and open new prospects and opportunities for all its players

The ALROSA affiliate in Vladivostok established in 2016 was headed by Alexey Ivanov about half a year ago. He was charged with the responsibility for developing business on the company's Far Eastern platform and attracting new customers to the Eurasian...

25 december 2017

NDTC to supply rough worth about $400 m this year

The Namibia Diamond Trading Company (NDTC), a joint venture between the Namibian government and De Beers, said it expects to supply rough diamonds worth $390 million this year. The diamond trader, which has 11 sightholders, had a fixed supply...

18 december 2017

Chinese lab spots stone with CVD coating

11 december 2017
A Chinese gemological laboratory has identified a well-concealed synthetic-diamond coating that bolstered the size of a small natural stone.While the lower part of the stone was a colorless, natural diamond, the upper section, including the crown and the top of the pavilion, contained a layer of diamond created using chemical vapor deposition (CVD).
CVD coatings have been present in the industry for many years, but according to the Beijing-based National Gemstone Testing Center (NGTC), which detected the stone said in a statement: “CVD overgrowth, which significantly influences the weight and size of the diamond, is still rarely reported up to now,” and therefore a major concern for the trade.
NGTC also stated that the coating over the brilliant-cut, 0.11-carat, near-colorless diamond was hard to detect, with no features betraying its existence visible using a microscope. The layer was thicker, perhaps indicating an improvement in growth technique there were no blemishes on the stone resembling needle marks.
NGTC gemologists were able to identify the overgrowth with spectroscopic analysis, as well as images were taken using DiamondView technology. However, the lab did not mention how much weight the coating added to the diamond.

Aruna Gaitonde, Editor-in-Chief of the Asian Bureau, Rough & Polished

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