Five questions on lesson 4 of The four Cs. 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: When does a yellow diamond become a fancy color?
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b: Past Z it is treated as a colored diamond, and a strong enough color gets a fancy grade.
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Question 2: On the fancy scale, which is usually more valued?
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b: On the fancy scale, a stronger and purer color is the prize.
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Question 3: What color is the fluorescence of most fluorescent diamonds?
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a: More than 95% of fluorescent diamonds glow blue.
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Question 4: Your stone has Strong blue fluorescence. What does that do to its color grade?
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c: The report lists it as an extra characteristic that helps to identify the stone.
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Question 5: In the simulator, a Very strong stone looks just like a None stone in Photo studio. Why?
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The glow shows only under UV light. GIA found that for most diamonds, fluorescence makes no difference you can see in daylight.
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- Next: Lesson 5, Clarity: eleven grades at 10x
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