The cut of a diamond refers to its proportions. Despite popular misconception, a diamond’s cut is not the same thing as its shape.

Every shape of diamond has different grades of cuts and it is the cut of a diamond that is most representative of its beauty, brilliance, and value. The cut is also the most technically difficult to pinpoint and requires precise analysis and state-of-the-art technology to accurately assess. However, while it takes expert knowledge and advanced tools to analyze the quality of a diamond’s cut, the naked eye can notice differences in light performance from one diamond to another, which is a key indication of the quality of the diamond’s cut. The better the cut, the more magnificently a diamond sparkles.

In order to determine the cut of a diamond, jewelers and gemstone experts, such as our Master Jeweller and GIA Graduate Gemologist, use the GIA Diamond Cut Scale to measure brightness, fire, and scintillation.

Brightness refers to the internal and external white light reflected from a diamond.

Fire refers to the dispersion of a diamond’s light into all the colors of the rainbow.

Scintillation refers to the amount of sparkle that a diamond produces, and the flashes of light and patterns of light and dark noticeable when a diamond is moved.

Before determining the final cut grade of any given diamond, the design and craftsmanship of the diamond is also assessed. This includes consideration of the diamond’s weight in relation to its diameter, its girdle thickness (which affects its durability), the symmetry of its facet arrangement, and the quality of polish on those facets.

The GIA Diamond Cut Scale for standard round brilliant diamonds contains five grades, which range from Excellent to Poor, as seen on the Cut Grade example below.

Within each grade there are ranges of quality and we are known for hand-selecting the highest quality diamonds available. We take pride in offering only the finest and most spectacular diamonds in each grade at very competitive prices, to ensure that you receive optimal value for your investment.