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Belgian Lab Detects Diamond with Fake Inscription

September 22, 2021

RAPAPORT... HRD Antwerp discovered a fake inscription on a 1.50-carat polished diamond the lab had received for grading. 

The stone came with a Gemological Institute of America (GIA) grading report that identified it as type IIa, meaning that it contained virtually no elements other than carbon, HRD said Monday. However, during testing, they found that the diamond had undergone High Pressure-High Temperature (HPHT) color treatment. The accompanying GIA grading report listed the stone as a natural diamond with no color treatments.

Although the diamond’s carat weight, color and cut precisely matched the GIA report, HRD noticed inconsistencies with clarity characteristics that were quite similar to those listed in the certification and could easily be mistaken during a standard loupe inspection, it explained.

“Detailed microscopic investigation by an experienced grader revealed that this was not the same diamond described in the report,” HRD said. “The clarity characteristics did not completely overlap. Since these characteristics are a unique fingerprint of the diamond, the inscription was conclusively identified as false. The diamond at hand had been intentionally inscribed with a fake laser inscription to deceive the customer.”

Image: The diamond bearing the fake inscription. (HRD Antwerp)

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