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Sarine, NGTC Partner on Grading Standards
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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...
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Polished Markets
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Sep 19, 2019
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Rapaport News
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Asian Groups Seek to Standardize Region’s Trade
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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...
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Polished Markets
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Mar 07, 2019
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Rapaport News
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Roberto Coin Jade Line Pulled from Macy’s
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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...
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Financial-Legal
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Dec 31, 2018
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Leah Meirovich
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Lab Finds 3ct. Synthetic with Fake Report
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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,...
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Technology
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Apr 15, 2018
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Joshua Freedman
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Lab Spots Stone with CVD Coating
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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...
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Polished Markets
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Dec 07, 2017
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Rapaport News
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India and China Labs Cooperate
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Two major gemological institutions in India and China haveagreed to increase their collaboration in an effort to strengthen trade betweenthe two markets. China’s state-run National Gem Testing Center (NGTC) hassigned a letter of cooperation with the Mumbai-based...
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Technology
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Nov 27, 2017
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Rapaport News
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