Five questions on lesson 1 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: Why does the GIA color scale start at D?
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b: The creators wanted no link to the older systems, which people used loosely.
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Question 2: How many clarity grades are there, from FL to I3?
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c: FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2, I3.
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Question 3: Which C is measured on a scale and not judged by eye?
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a: The lab weighs it on a balance; graders judge the others by eye.
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Question 4: In the simulator, you change a stone from 1 to 2 carats. What happens to its face-up pattern?
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b: The proportions are the same, so the pattern is the same at a larger size.
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Question 5: Which diamonds get a GIA cut grade?
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b: Fancy shapes are too different for one system, so far.