What you need to know

  • Cut can be considered a diamond’s most important characteristic as it has the greatest overall influence on a diamond’s beauty, and therefore value.
  • It determines a diamonds brilliance which we generally think of as its overall sparkle.

We at Lover’s Rock recommend selecting the highest cut grade within your budget, as no other of the Four Cs characteristics has a greater influence on a diamond’s appearance.

A diamond’s cut grade is an objective measure of how well a diamond handles light, which determines the overall brilliance or sparkle of the diamond. When a diamond is cut with the proper proportions, the maximum amount of light reflects back 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. The less light reflected back out the top of the diamond, the less brilliance or sparkle a diamond emits.


Cut Grades

  • Excellent or Ideal cut: Reflects nearly all light that enters the diamond offering the most Brilliance and sparkle, making it one of the most valued and cherished cut grades. In some cases, when an excellent cut diamond reflects a vast amount of light, it can be upgraded to the exceptional and rarer ‘Ideal Cut’.
  • Very good cut: Reflects nearly as much light as the excellent cut. However, as the difference between the two is almost unrecognisable to the unaided eye, very good cuts offer better value for money.
    Good cut: Reflects most light that enters, allowing only a small amount to escape. The difference between this cut and the very good cut is minimal. However the cost is substantially cheaper, making good cuts a much more affordable option.
  • Fair cut: Still a quality diamond that sparkles, but when compared to higher cut grades, fair cut will not emit as much brilliance.
  • Poor cut: Diamonds that are generally so deep or shallow that they lose most of the light out the sides and bottom, therefore reflecting hardly any light back through the Diamond. Lovers Rock does not carry diamonds with cut grades of poor.

Which Cut Grade is Best for my Budget

  • Finest quality: Ideal and Excellent
  • Best balance between quality and cost: Very good
  • Biggest size at an affordable price: Good

To learn even more about cut, including technical information on brilliance, fire, polish and symmetry, please click on the relevant link.

To learn more about the anatomy of a diamond click here

Now that you understand how cut affects a diamond’s Brilliance, learn about colour.

Have a question?

Contact us by phone at 03330 064 411 or email at Alternatively, Live Chat is available during business hours.

Now that you understand how cut affects a diamond’s Brilliance, learn about colour.