CDG Laboratory Grading Reports & Documentation Flashcards

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

Answer: The diamond's purchase price or market value

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.

The AGS cut grading scale uses which numerical system?

Answer: 0 to 10, with 0 being Ideal

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.

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

Answer: A diagram showing the location and type of clarity characteristics

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

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

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

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

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

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

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

What information does the 'fluorescence' section of a GIA report provide?

Answer: The diamond's fluorescence intensity and color under long-wave UV light

GIA reports note fluorescence intensity (None through Very Strong) and color under long-wave UV, which can influence the diamond's appearance and market value.