GIA Certification Standards & Documentation 3 — Questions and Answers
Question 1: Which GIA report specifically addresses whether a diamond's color is naturally occurring or the result of treatment?
- GIA Diamond Grading Report
- GIA Diamond Origin Report
- GIA Colored Diamond Grading Report (Correct answer)
- GIA Diamond Identification Report
Correct answer: GIA Colored Diamond Grading Report
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?
- 0.15 ct
- 0.25 ct
- 0.50 ct (Correct answer)
- 1.00 ct
Correct answer: 0.50 ct
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?
- As a letter grade from D to Z
- As a descriptive hue, tone, and saturation combination (Correct answer)
- As a numeric scale from 1 to 10
- As a percentage of color concentration
Correct answer: As a descriptive hue, tone, and saturation combination
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?
- GIA Laboratory Services
- Report Check on GIA.edu (Correct answer)
- GIA Alumni Portal
- Dealer Network Verification
Correct answer: Report Check on GIA.edu
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?
- Depth percentage
- Table percentage (Correct answer)
- Girdle thickness ratio
- Crown angle percentage
Correct answer: Table percentage
Table percentage expresses the width of the table facet as a percentage of the average girdle diameter.
Question 6: On a GIA Diamond Grading Report, what does a culet notation of 'None' indicate?
- The diamond has a pointed base with no culet facet (Correct answer)
- The diamond is unfinished
- The culet is too small to measure
- The culet is abraded
Correct answer: The diamond has a pointed base with no culet facet
A culet of 'None' means the diamond terminates in a pointed tip with no flat culet facet polished at the base.
Question 7: Which fluorescence grade on a GIA report indicates the strongest reaction under UV light?
- Strong
- Intense
- Very Strong (Correct answer)
- Extreme
Correct answer: Very Strong
GIA's fluorescence scale uses None, Faint, Medium, Strong, and Very Strong—with Very Strong being the highest grade.
GIA Certification Standards & Documentation 3
Which GIA report specifically addresses whether a diamond's color is naturally occurring or the result of treatment?