CDG CDG Laboratory Grading Reports & Documentation 2

Question 1

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

Accepted Answer

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

Answer

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

Question 2

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

Accepted Answer

To link the physical diamond to its grading report

Answer

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

Question 3

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

Accepted Answer

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

Answer

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

Question 4

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

Accepted Answer

Micro-printing and color-shifting ink

Answer

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

Question 5

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

Accepted Answer

Confirm the laser inscription matches the report number under magnification

Answer

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.

(CDG) Certified Diamond Grader Practice Test

(CDG) Certified Diamond Grader Practice Test

CDG CDG Laboratory Grading Reports & Documentation 2