GIA DIAMONDS AND DIAMOND GRADING FINAL EXAM NEWEST COMPLETE 180 QUESTIONS AND CORRECT DETAILED ANSWERS

GIA DIAMONDS AND DIAMOND GRADING FINAL EXAM NEWEST COMPLETE 180 QUESTIONS AND CORRECT DETAILED ANSWERS ( ANSWERS)

1 P a g e 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 2 P a g e 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 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? - ANSWERCost to recut