CDG CDG Laboratory Grading Reports & Documentation

Question 1

On a GIA Diamond Grading Report, which of the following is NOT included?

Accepted Answer

The diamond's purchase price or market value

Answer

GIA grading reports do not include monetary value, as GIA is a grading laboratory — not an appraisal service — and valuation is the role of a separate appraiser.

Question 2

The AGS cut grading scale uses which numerical system?

Accepted Answer

0 to 10, with 0 being Ideal

Answer

AGS uses a 0–10 scale where 0 represents the Ideal cut grade and 10 represents Poor — counterintuitively, the lowest number is the highest quality.

Question 3

What does the 'plot' on a GIA grading report indicate?

Accepted Answer

A diagram showing the location and type of clarity characteristics

Answer

The plot is a diagram of the diamond showing the location, type, and relative size of all clarity characteristics observed during grading.

Question 4

On a GIA report, what does a 'VS1' clarity grade mean?

Accepted Answer

Very Slightly Included — minor inclusions difficult to see under 10x magnification

Answer

VS1 (Very Slightly Included 1) means the diamond has minor inclusions that are difficult to detect under 10x magnification by a skilled grader.

Question 5

Which feature on modern GIA reports allows a recipient to verify the report's authenticity online?

Accepted Answer

A hologram and QR code linked to GIA's Report Check system

Answer

GIA reports include a hologram and QR code that connect to GIA's online Report Check, allowing instant digital authentication of any report.

(CDG) Certified Diamond Grader Practice Test

(CDG) Certified Diamond Grader Practice Test

CDG CDG Laboratory Grading Reports & Documentation