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IGI Identifies 6ct. Lab-Grown Submitted as Natural

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Rapaport News • 09-06-2021

The International Gemological Institute (IGI) has discovered a 6.18-carat synthetic diamond that fraudsters had misrepresented as natural by falsely pairing it with a mined-diamond grading report.

This is the largest lab-grown diamond ever certified by a leading gemological laboratory where the sole purpose was to pass off a lab-grown stone as natural, Bob Van Es, IGI managing director for Thailand and Hong Kong, said Wednesday.

A client submitted the round brilliant-cut loose stone to IGIs Thailand lab for verification purposes. It came with a certificate from the Gemological Institute of America (GIA) for a natural, D-flawless diamond, but had in fact been cut with meticulous precision to match the data on that report, IGI noted. The stone was also inscribed with a fake GIA laser number corresponding to the certificate.

IGI has noted a rise in consumers sending diamonds to a second lab for checking, which can help avoid getting duped by fraudsters.

At IGI, we have seen a huge increase in double-verification demand, which means before going for a major purchase, consumers like to receive confirmation that the stone matches the original report, Van Es noted.

Image: Diamond grading. (International Gemological Institute)

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