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GIA CVD
GIA Spots Natural-Synthetic Hybrid Diamond
The Gemological Institute of America (GIA) has discovered asynthetic layer that improved the weight and color of a natural diamond, and haswarned that the phenomenon may be happening more often.The cushion modified brilliant, 0.64-carat...
Technology May 20, 2019 Rapaport News
DiamondDect5
What Makes a Good Synthetics Detector?
The massive project by the Diamond Producers Association (DPA) and Signet Jewelers to test and review 18 synthetic-diamond detectors has raised an important question: What should you look for in such a machine?Accuracy is, of course, a major...
Technology Mar 12, 2019 Joshua Freedman
DPA synthetics detectors study Mar 2019
DPA Puts Synthetics Detectors to the Test
A synthetics detector costing less than $7,000 is one of only two machines that conclusively identified 100% of lab-grown diamonds in a recent industry-widestudy.Yehuda’s Sherlock Holmes, priced at $6,495, correctlyspotted all synthetic diamonds in a “deliberately challenging” sample,according to a report...
Technology Mar 05, 2019 Rapaport News
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
GIA synthetic inscription forgery
GIA Finds Synthetic Diamond with Forged Inscription
Fraudsters forged a Gemological Institute of America (GIA)inscription on a synthetic diamond to make it appear that the stone was thetrue bearer of a natural-diamond grading report, the institute said.The engraving on the polished diamond’s girdle contained a genuineGIA report...
Technology Nov 13, 2017 Rapaport News
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