Five questions on lesson 5 of Reading a grading report. The questions and the answers to pick from come in a new order every time you start.
Pick an answer, and the question marks itself. For a question that you answer in your own words, think of your answer first. Then show our answer and say whether you had it. Nothing is saved or sent.
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Question 1: A round has Excellent proportions and Fair symmetry. What's the best GIA cut grade it can get?
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c: Fair finish caps the cut at Good.
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Question 2: Which of these is a symmetry fault?
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b: The culet's position is a proportion-related symmetry fault; burn marks and polish lines are polish.
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Question 3: A report says "Fluorescence: None". Does the stone have no reaction at all to UV?
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Not necessarily: "None" covers indiscernible up to very faint.
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Question 4: Can a fancy-shaped diamond have polish and symmetry grades at IGI?
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Yes: IGI lists them for every shape and color.
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Question 5: In the H&A Scope, why can a stone with perfect proportions still show only 85% symmetry?
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Symmetry is about whether the facets match each other. Misaligned mains break the match, even when the angles are right on average.
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