CDG Laboratory Grading Reports & Documentation Flashcards

A diamond grader suspects a GIA report may be counterfeit. What is the FIRST step to verify authenticity?

Answer: Use GIA's online Report Check tool with the report number

GIA's online Report Check tool is the definitive first step, providing real-time verification of any report's authenticity using the report number.

What is the primary purpose of a laser inscription on a diamond's girdle?

Answer: To link the physical diamond to its grading report

Laser inscription typically records the GIA report number, permanently and tamper-evidently linking the physical stone to its specific grading report.

What should a grader do if a diamond's measured weight does not match the weight stated on the accompanying report?

Answer: Treat it as a potential fraud situation and follow the laboratory's protocol for mismatched stones

A weight discrepancy between a diamond and its report is a serious fraud indicator suggesting possible stone switching, requiring formal laboratory protocols.

Which security feature on modern GIA reports specifically prevents accurate reproduction by photocopying or color printing?

Answer: Micro-printing and color-shifting ink

Micro-printing and color-shifting ink on GIA reports cannot be accurately reproduced by standard photocopying or color printing, preventing counterfeit copies.

When a client presents a diamond claimed to be 'D Flawless' with a GIA report, what verification step is most critical?

Answer: Confirm the laser inscription matches the report number under magnification

Confirming the laser inscription matches the report number ensures the stone and document are a matched pair, which is the most critical verification for high-value stones.

What does it mean when a GIA report status shows as 'canceled'?

Answer: The laboratory has invalidated it due to tampering, alteration, or discovery of undisclosed treatment

A canceled GIA report has been invalidated by the laboratory, typically because evidence of tampering, alteration, or undisclosed treatment was discovered after issuance.