Ideal Cuts of Diamond Shapes
1) Premium Cut Round Brilliant Cuts
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Depth and table are the two prime factors in deterimining quality of cut by previous standards. Depth is the depth of the diamond divided by average diameter for rounds, Table is the large flat surface on the top of the diamond. Table is the table diameter divided by total diameter. Below are guidelines previously used for Hadar Diamonds' ideal cuts. Keep in mind many gemologists have varying opinions on what qualifies as an ideal cut. |
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Cut grade ratings are listed below: Hadar Diamonds recommends PREMIUM or better based on this system. |
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Ideal cuts for other shapes:
2) Princess
Ultra Ideal: Depth 64.0-75.0, Table 62-69, Polish & Symmetry Very Good or Excellent
Ideal: Depth 64.0-75.0, Table 62-74
Premium: Depth 64.0-78.0, Table 60-77
Good: Depth 58.0-80.0, Table 58-82
Average: Depth 56.1-84.0, Table 53-85
Poor: Depth < 57 or > 84, Table < 51 or > 85
3) Emerald & Radiant
Ultra Ideal: Depth 63.1-69.9, Table 62-69, Polish & Symmetry Very Good or Excellent
Ideal: Depth 62.0-74.9, Table 62-72
Premium: Depth 61.0-76.0, Table 60-75
Good: Depth 58.0-80.0, Table 58-79
Average: Depth 56.1-84.0, Table 53-85
Poor: Depth < 56.1 or > 84.0, Table < 53 or > 85
4) Asscher
Ultra Ideal: Depth 63.1-69.9, Table 55-64, Polish & Symmetry Very Good or Excellent
Ideal: Depth 62.0-73.9, Table 53-69
Premium: Depth 61.0-76.0, Table 52-75
Good: Depth 60.0-80.0, Table 51-79
Average: Depth 56.1-84.0, Table 50-85
Poor: Depth < 56.1 or > 84.0, Table < 53 or > 85
5) Marquise, Oval & Pear
Ultra Ideal: Depth 59.0-63.0, Table 57-60, Polish & Symmetry Very Good or Excellent
Ideal: Depth 59.0-63.0, Table 57-60
Premium: Depth 57.1-66.0, Table 53-63
Good: Depth 56.1-68.9, Table 52-66
Average: Depth 46.1-71.0, Table 51-69
Poor: Depth < 46.1 or > 71.0, Table < 51 or > 69
6) Heart, Trillion, Cushion & Others
No industry guidelines for ideal cut