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CUT GRADING ACROSS DIAMOND SHAPES
Cut grading is typically provided for Round diamonds only. This is because assessing the ideal proportions of shapes like Marquise and Cushion is challenging. However, some experts have researched the ideal proportions for these shapes, and we provide a brief guide below.
Step Cuts
(Asscher and Emerald)
Excellent
Depth percentage – 58 - 65
Table percentage – 60 - 65
Very good
Depth percentage – 55 – 70
Table percentage – 59 - 70
Good
Depth percentage – 52 - 75
Table percentage – 52 - 75
Excellent
Depth percentage – 58 - 65
Table percentage – 60 - 65
Very good
Depth percentage – 55 - 70
Table percentage – 59 - 70
Good
Depth percentage – 52 - 75
Table percentage – 56 - 75
Modified Brilliant Cut Diamonds
(Pear, Princess, Marquise, Radiant, Oval, and Heart)
Here is a guide to the depth percentage and table percentage you should be looking for in regards to each of the sought-after grades.
Excellent
Depth percentage – 58 - 64
Table percentage 55 - 62
Very good
Depth percentage – 57 - 66
Table percentage – 53 - 64
Good
Depth percentage – 56 - 68
Table percentage – 52 - 65
Excellent
Depth percentage – 62 - 73
Table percentage - 57 – 72
Very good
Depth percentage – 60 - 77
Table percentage – 55 - 75
Good
Depth percentage – 57 - 83
Table percentage – 52 - 85
Excellent
Depth percentage – 58 - 64
Table percentage – 55 - 62
Very good
Depth percentage – 57 - 66
Table percentage – 53 - 64
Good
Depth percentage – 56 - 68
Table percentage – 52 - 65
Excellent
Depth percentage – 52 - 60
Table percentage – 55 - 62
Very good
Depth percentage – 50 - 62
Table percentage – 50 - 62
Good
Depth percentage – 45 - 65
Table percentage – 52 – 65
Excellent
Depth percentage – 58 - 64
Table percentage – 55 - 62
Very good
Depth percentage – 57 - 66
Table percentage – 53 - 64
Good
Depth percentage – 56 - 68
Table percentage – 52 - 65
Excellent
Depth percentage – 62 - 68
Table percentage – 58 - 65
Very good
Depth percentage – 58 - 70
Table percentage – 56 - 70
Good
Depth percentage – 57 - 75
Table percentage – 54 -75
Round Brilliant Cut
This is the most brilliant among all diamond cuts. Here's a guide to the depth percentage and table percentage you should consider for each of the highly desired grades.
Excellent
Depth percentage – 60 - 63
Table percentage – 53 – 58
Very good
Depth percentage – 58 - 64
Table percentage – 52 - 62
Good
Depth percentage – 56 - 67
Table percentage – 50 - 67
