Diamond Grading – Cut

Cut: the Ideal Cut

The type and shape of cut proportions, symmetry, and outer marks are taken into consideration when grading a diamond’s cut. You should look for a stone that has the “Fine Brilliant Cut.” The following table shows the terms and definitions for grading according to cut of brilliants under 1.00 carat.

Shallow Cut

Ideal Cut

Deep Cut



Term Definition

Very Good Exceptional brilliance: few and only minor outer marks
Good Good brilliance: some outer marks
Medium Slightly less brilliance: some larger outer marks.
Poor, Less brilliance: large and many outer marks.

Diamonds are cut in several different shapes: Round, Pear, Marquise, Emerald, Square, Trillion, and others.

Cut - Color - Clarity - Carat

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