- | P a g e
GIA DIAMONDS AND DIAMOND GRADING
FINAL EXAM NEWEST 2024 -2025 ACTUAL EXAM
COMPLETE 180 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS )
|ALREADY GRADED A+
Why must a diamond be re-examined under magnification after color grading? - ANSWER- Confirm identity
What diamond size makes it easiest to see subtle color? - ANSWER- The larger the diamond, the easiest it is to see color
What results from averaging the sum of the smallest and largest diameters of a round brilliant - ANSWER- Average girdle diameter
How many crown angles on a round brilliant diamond should be estimated before averaging? - ANSWER- 8
What weight retention method lightly polished lower half facets? - ANSWER- Painting
- / 3
- | P a g e
What may result from a thick, unpolished girdle? - ANSWER- Grey, reflection on the stone
How is a diamond positioned to estimate the lower half facet length percentage? - ANSWER- Face up position
Why do diamonds with steep crowns offer less vaule? - ANSWER- Look smaller face-up than weight suggest
What describes the polish quality and cut precision of a diamond? - ANSWER- Craftmanship
What proportion greatly influences brightness in a round brilliant diamonds? - ANSWER- Table percentage
How do steep pavilion angles affect appearance? - ANSWER- Produce dark areas under the table
What parameters is measured at the belly of an oval? - ANSWER- Width
What are the clarity fractors used for grading fancy cuts? - ANSWER- Size, number, location, relief, nature 2 / 3
- | P a g e
How does graders view the bow-tie effect in a stone? - ANSWER- Face-up
What is a fancy shape diamond compared to when judging appeal? - ANSWER- Should be graceful and pleasing Should be the standard for their particular shape and style
What is a square or rectangular modified brilliant cut? - ANSWER- Radiant
Why is the face down diagonal direction used for color grading fancy-cut diamonds? - ANSWER- Shows average amount of color
What helps reveal inclusions hidden by a moutning? - ANSWER- Reflections
What clarity grade can a potential become? - ANSWER- They can be repolished to improve clarity up to an internally flawless grade
What is a consideration for diamond recutting? - ANSWER- Cost to recut
- / 3