The four Cs · lesson 7

How a cut grade is set

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

Five questions on lesson 7 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.

  1. Question 1: A diamond has Excellent proportions and Good symmetry. What is the best cut grade it can get?

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    b: Good finish caps the cut grade at Very Good.

  2. Question 2: What does "deductive" mean for a cut grade?

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    b: One weak component pulls the whole grade down.

  3. Question 3: Which of these is part of the design, not the face-up appearance?

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    b: Weight ratio (and durability) are part of the design.

  4. Question 4: In the tool, the T73 with a 41.6° pavilion grades Very Good, but 41.6° is inside the Excellent pavilion range. Why?

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    The grade judges the proportions as a combination: that pavilion with that crown and table is outside the Excellent zone.

  5. Question 5: You fix the angles of a stone, and it goes from Poor to Good, limited by symmetry Fair. What do you fix next, and what is the grade after that?

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    Symmetry (and polish, which is Good). Then the grade goes up to the next limit, which in the rescue is the girdle and depth.

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