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

The diamond's measurements

Answer

The clarity grade

Answer

The cut grade (for round brilliants)

Question 2

The AGS cut grading scale uses which numerical system?

Accepted Answer

0 to 10, with 0 being Ideal

Answer

1 to 5, with 1 being Excellent

Answer

A to F, with A being the best

Answer

10 to 100, with 100 being Ideal

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 diamond's proportions and angles

Answer

The grading laboratory's authentication mark

Answer

The diamond's fluorescence pattern

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

Very Superior — first grade above Flawless

Answer

Verified Stone — first quality assessment

Answer

Very Small Inclusions — visible to the naked eye

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

The grader's handwritten signature on the back

Answer

The laboratory director's embossed stamp

Answer

A serial number engraved on the table facet

Question 6

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

Accepted Answer

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

Answer

The diamond's phosphorescence duration

Answer

The chemical composition causing fluorescence

Answer

The fluorescence response under both long and short-wave UV