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Sarine
Sarine, NGTC Partner on Grading Standards
Sarine Technologies is collaborating with China’sNational Gemstone Testing Center (NGTC) to advance diamond-gradingstandards in China. Sarine CEO DavidBlock and NGTC president ZhiBin Ye signed the agreement in Beijing Monday, with the intention of combining NGTC’s extensive...
Polished Markets Sep 19, 2019 Rapaport News
China standardization
Asian Groups Seek to Standardize Region’s Trade
Four of Asia’s industry groups have agreed to work together on standardizing language and rules for the diamond trade. The National Gemstone Testing Center (NGTC), the Gem andJewelry Institute of Thailand (GIT), the Gemmological...
Polished Markets Mar 07, 2019 Rapaport News
Roberto Coin black jade
Roberto Coin Jade Line Pulled from Macy’s
Macy’s has removed a collection of Roberto Coin black-jadejewelry from its shelves following allegations the line bears unlawful gemcertification. Natural-stone supplier Kings Stone, which made the claimsthat prompted Macy’s move in April, filed...
Financial-Legal Dec 31, 2018 Leah Meirovich
IIDGR
De Beers Grading Unit Launches Courses in China
The International Institute of Diamond Grading and Research(IIDGR) will launch a series of educational courses in China through apartnership with a local grading organization, it said Tuesday. The De Beers subsidiary will collaborate with the NationalGemstone Testing...
Polished Markets Sep 13, 2018 Rapaport News
China synthetic diamond 150
Lab Finds 3ct. Synthetic with Fake Report
A grading laboratory in China has discovered a synthetic diamond masquerading as a natural stone, complete with a forged inscription and a falsified report.The National Gemstone Testing Center (NGTC) in the city of Shenzhen received a round-brilliant, 3.1-carat diamond ring,...
Technology Apr 15, 2018 Joshua Freedman
Chinese Grading Lab 150 120617
Lab Spots Stone with CVD Coating
A Chinese gemological laboratory has identified awell-concealed synthetic-diamond coating that bolstered the size of a small naturalstone. While the lower part of the stone was a colorless, naturaldiamond, the upper section, including the crown and...
Polished Markets Dec 07, 2017 Rapaport News
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