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GIA DIAMONDS AND DIAMOND GRADING FINAL EXAM NEWEST COMPLETE 180 QUESTIONS AND CORRECT DETAILED ANSWERS ( ANSWERS)
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GIA DIAMONDS AND DIAMOND GRADING
FINAL EXAM NEWEST 2026-2027
COMPLETE 180 QUESTIONS AND CORRECT
DETAILED ANSWERS ( ANSWERS)
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
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What may result from a thick, unpolished girdle? - ANSWERGrey, 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? - ANSWERProduce 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
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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? - ANSWERCost to recutÂÂ
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