Diamond Cut Proportions

Education Cut

The cut of a diamond is not to be confused with diamond shape. The cut refers to the manner in which a diamond has been shaped and polished to ensure the diamond reflects the maximum amount of light.

A round shaped diamond has been cut to the exact proportions to ensure maximum light reflection and refraction, and is therefore considered the most brilliant and sparkling of all the diamond shapes.

Cut is a diamond's most important feature as it has the greatest overall influence on a diamonds beauty. The cut of a diamond determines its brilliance - the better a diamond is cut, the more it will sparkle. When a diamond is cut with the ideal proportions, light is returned out of the top of the diamond, giving the diamond maximum fire and brilliance.

A shallow cut diamond will often have a larger diameter, and therefore a larger look for the given carat weight. However it will lack much of the sparkle found in an ideal cut due to the leakage of light from the bottom of the diamond.

A deep cut diamond will cause leakage of light from the sides of the diamond, once again compromising the brilliance of the diamond.



Ideal: Reflects nearly all light that enters the diamond. A superb and exceptional cut.

Very good: Reflects nearly as much light as the ideal cut, but for a lower price.

Good: Reflects most light that enters, however is much less expensive than either the ideal cut or the very good cut.

Fair: A quality diamond, but a fair cut will not be as brilliant as a good cut.

Poor: Diamonds generally so deep and narrow, or shallow and wide, that they lose most of the light out the sides and bottom. As Divinity Diamond works with the highest quality cutters and polishers, we will not be stocking diamonds of this cut.