Cut

on Tuesday, 21 January 2014. Posted in Diamond Education

Key Points

  • Cut is a diamond's most important characteristic.
  • It has the greatest overall influence on a diamond's beauty.
  • It determines what we generally think of as sparkle.

A diamond's cut grade is an objective measure of a diamond's light performance, or, what we generally think of as sparkle. When a diamond is cut with the proper proportions, light is returned out of the top of the diamond . If it is cut too shallow, light leaks out of the bottom; too deep and it escapes out of the side.

Cut Grades

  • Our most brilliant cut, representing roughly the top 1% of diamond quality based on cut. The highest grades of polish and symmetry allow it to reflect even more light than the standard ideal cut.
  • Ideal cut : Represents roughly the top 3% of diamond quality based on cut. Reflects nearly all light that enters the diamond. An exquisite and rare cut.
  • Very good cut : Represents roughly the top 15% of diamond quality based on cut. Reflects nearly as much light as the ideal cut, but for a lower price.
  • Good cut : Represents roughly the top 25% of diamond quality based on cut. Reflects most light that enters. Much less expensive than a very good cut.
  • Fair cut : Represents roughly the top 35% of diamond quality based on cut. Still a quality diamond, but a fair cut will not be as brilliant as a good cut.
  • Poor cut : Diamonds that are generally so deep and narrow or shallow and wide that they lose most of the light out the sides and bottom. 
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