Young people in China have become the main force of jewellery consumption

Armed with a Bachelor's degree from Beijing Normal University, Zhuhai, as well as majoring in Franchise Management, Wang was greatly influenced by his parents in the field of jewelry. This has resulted in his unique opinions about innovative design...


ZCDC re-orients diamond valuation plan as it seeks ‘right market price’

At some point experts claimed that the Marange diamond fields contained between 2 and 7 billion carats of raw diamonds and that Zimbabwe was sitting on over 25 percent of the known diamond deposits in the world. Others even put the value of the Marange...

12 march 2018

Art historian Valentin Skurlov: "Faberge, like all court jewelers, actively used diamonds"

Valentin Skurlov is a historian of jewelry art, a candidate of art history, an honorary academician of the Russian Academy of Arts, a scientific secretary and a herald master of the Faberge Memorial Foundation, and a research consultant for the Fabergé...

05 march 2018

Ari Epstein: The diamond trade is stable again

Ari Epstein, CEO of the Antwerp World Diamond Centre (AWDC), dwelled on the results of the past year and the current situation in the diamond market in his interview to Rough&Polished.

26 february 2018

Lucapa to become a niche diamond company, says Wetherall

Lucapa Diamond believes that it will become the only company in the world with multiple diamond mining operations whose average diamond value is in excess of $1,000 per carat, once the Mothae mine is commissioned this year. Company chief executive and...

19 february 2018

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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