The Diamond Cut

The diamond cut is one of the 4 C’s and refers to the shape and the light performance of the diamond. The diamond cut is the most important factor in determining how much the diamond will sparkle. A diamond with an ideal cut will be highly reflective and sparkling. The ideally cut stone also has the best grades on polish and symmetry, which can only be reached when the stone is fashioned with great care. In short: the diamond cut or diamond brilliance defines the uniqueness of the diamond!

Diamond cut grades

Most diamond certificates specify different diamond cut grades. The system is divided as follows:

Ideal cut

When a round diamond is cut to perfect proportions, its depth and table percentages are perfectly balanced. The ideally cut stone also has the best grades on polish and symmetry, which can only be reached when the stone is fashioned with great care. The beauty of the stone is enhanced by the finest craftsmanship.

Very good cut

A diamond with a very good cut has very strict requirements for depth and table percentages. These proportions give the stone a maximal brilliance and icy fire.

Good cut

A diamond with a good cut has acceptable but imperfect proportions. Its brilliance and fire is good, which makes it a good stone for jewellery.

Fair cut

A diamond with a fair cut has less than perfect proportions to make the most of the weight. This cut sacrifices the brilliance of the stone.

Poor cut

A poorly cut diamond has imperfect proportions that make it look lustreless. Diamonds with a poor cut are not recommended for fine jewellery.
Some rating authorities ad the diamond cut rate ‘excellent’, which is similar to an ‘ideal’ cut. Moreover, some vendors have a special terminology to refer to diamond cuts and diamond grades.

Defining the diamond cut grade


It is not totally clear how certifiers specify the quality of a diamond cut. This proces is also different for the different diamond shapes. Some important factors are:

  • The number of facets: Facets are the flat areas on the surface of a diamond. An ideal round diamond for example should have 33 facets on the crown and 25 on the pavilion.
  • The height of the diamonds’ crown
  • The depth of the pavilion
  • The diameter of the top of the crown
  • The angels of the crown and the pavilion

Buying the best diamond cut

It depends on your own budget which diamond cut you prefer to buy. Of course, an ideal diamond cut will be more expensive than a poor cut, however, keep in mind that the other C’s (colour, carat, clarity) are also important!

Do you want more information about diamond cuts? Contact Diamondland!


Latest news

Same diamond, different meaning

We treasure diamonds for their beauty. No matter how big or how small. Diamonds will always have a majestic ambience. We give diamonds at special occasions, preferably to our loved…


The Royal Engagement Rings

Aren’t we all looking for that one perfect engagement ring that will knock your partner’s socks off? Maybe your fiancée-to-be is really into royal rings. If so, we can’t blame…


Engagement Ring Shopping Tips

Congratulations! You found the girl of your dreams and are ready to tie the knot. The marriage proposal is one of the most beautiful and memorable moments in her (and…