(IDEX Online) - A pear-cut 6.01-ct diamond submitted for grading at an IGI lab was found to be a lab grown impostor.It had the GIA laser inscription of a genuine natural diamond and was a close match for its carat weight, physical spread, and primary qualities.But it was soon revealed to be a CVD lab grown by gemologists in Tel Aviv."Everyone in our industry must be vigilant," said Tehmasp Printer, CEO at IGI. "As attempted fraud increases, the need for ongoing verification is a necessary step to protect consumers from purchasing misrepresented gems and jewelry."In June 2021, IGI reported a similar incident in Thailand. A 6.18-ct D color, flawless clarity diamond submitted as a natural diamond turned out to be a lab grown replica that had been cut and polished specifically to match the data on the GIA report.IGI explained how they unmasked the latest impostor diamond."Photoluminescence spectroscopy revealed a doublet at 737 nm due to SiV defects, indicating laboratory growth using the Carbon Vapor Deposition (CVD) process," it said."This was further supported by microscopy, which showed a carbon inclusion in place of the feather indicated by GIA, and a cloud, resulting in a lower clarity grade from IGI. A slight depth mismatch was also revealed. "Such discrepancies could go unnoticed outside of a laboratory, particularly once the stone is set into a piece of jewelry."Pics courtesy IGI show the fake GIA inscription and the pear-cut diamond.