Five questions on lesson 5 of Diamond vs moissanite. 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: You look straight down through the table of a moissanite with a loupe and see no doubling. Why?
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b: Cutters usually line the optic axis up with the table. So straight down, there's no split.
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Question 2: Where should you look instead?
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a: The pavilion edges behind a crown facet double.
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Question 3: Doubled facet edges prove a stone is…
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b: Any doubly refractive stone doubles. Diamond never does.
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Question 4: On every facet you check, the polish lines run the same way. What does that tell you?
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a: Diamond's hardness changes with direction, so its facets can't all be polished the same way.
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Question 5: In the simulator, set the T73 in moissanite to At an angle, then Face up. In which view is the doubling easiest to see, and why?
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At an angle. You look away from the optic axis, so the two rays separate. Face-up, you look almost along the axis.
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