Reading a grading report · lesson 4

Cut grade or light performance: what "Ideal" means

Lesson quiz · five questions, in a new order every time

Five questions on lesson 4 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.

  1. Question 1: A GIA report's cut grade line reads "Ideal". What's wrong?

    Show the answer

    b: GIA's cut grade runs Excellent to Poor.

  2. Question 2: What does "Ideal Cut Round Brilliant" in IGI's comments tell you?

    Show our answer

    It's an Excellent cut grade, and every proportion sits inside IGI's narrower middle band.

  3. Question 3: Which stones can get an AGS Ideal Report by GIA?

    Show the answer

    b: And even many Triple Excellents don't make it.

  4. Question 4: On an ASET map, what does gray mean?

    Show the answer

    b: Light that leaks out instead of returning.

  5. Question 5: A round has a 41.4° pavilion and otherwise T73 proportions. What would our tool say, and would it fit IGI's Ideal band?

    Show our answer

    The tool says Excellent. IGI's band ends at 41.3°, so it wouldn't get the Ideal comment.

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