GIA Certification Standards & Documentation 3

Question 1

Which GIA report specifically addresses whether a diamond's color is naturally occurring or the result of treatment?

Accepted Answer

GIA Colored Diamond Grading Report

Answer

The GIA Colored Diamond Grading Report evaluates and documents whether the fancy color is natural or the result of treatment.

Question 2

What is the minimum carat weight for which GIA typically issues a full Diamond Grading Report rather than a Diamond Dossier?

Accepted Answer

0.50 ct

Answer

GIA issues the Diamond Dossier for diamonds from 0.15 to 1.99 ct, while the full Diamond Grading Report (with plotting diagram) is commonly used for diamonds 0.50 ct and above.

Question 3

On a GIA Colored Diamond Grading Report, how is color grade expressed differently from colorless diamonds?

Accepted Answer

As a descriptive hue, tone, and saturation combination

Answer

Colored diamond grades describe hue (e.g., yellow), tone (light/dark), and saturation (faint to vivid), not a letter grade.

Question 4

What GIA service allows retailers to verify a report's authenticity without submitting the stone?

Accepted Answer

Report Check on GIA.edu

Answer

GIA's Report Check tool at GIA.edu allows anyone to verify a report's authenticity by entering the report number online.

Question 5

Which proportion on a GIA report is described as the percentage of the diamond's diameter occupied by the table facet?

Accepted Answer

Table percentage

Answer

Table percentage expresses the width of the table facet as a percentage of the average girdle diameter.

(GIA) Certified Diamonds Gemological Institute of America Practice Test

(GIA) Certified Diamonds Gemological Institute of America Practice Test

GIA Certification Standards & Documentation 3