Five questions on lesson 4 of Anatomy of a diamond. 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: What does the crown angle measure?
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a: The bezels' slope, measured from the girdle plane.
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Question 2: You make the crown steeper at the same table. What happens to the crown height?
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b: The same ring, at a steeper slope, rises higher.
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Question 3: The T73 at a 36.5° crown is Very Good, but 36.5° is inside the Excellent angle range. Why?
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a: About 17.5%, past the Excellent limit of 17.0%.
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Question 4: Which part of the stone spreads white light into fire on its way out?
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b: The sloped crown facets bend each color differently.
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Question 5: A 31.5° crown grades Very Good with the T73's pavilion. What could make it Excellent?
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A steeper pavilion, 41.2° to 41.8°: crown and pavilion are graded together.
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