The cut of a diamond refers to its proportions. It is one of the most important factors to be considered while choosing your diamond. It is an aspect which is directly influenced by man. The other three are influenced totally by nature.

The cut of a diamond should not be confused with its shape. Shapes are cut from the original rough diamond, and whatever the shape, a well-cut diamond is always better able to reflect light.

Diamonds are usually cut with 58 facets, or separate flat surfaces. These facets are placed at precise angles to each other. This relationship is designed to maximize the amount of light reflected through the diamond and to increase its beauty.

Rough stones can be cut to their maximum weight and monetary value but loses some "brilliance and "sparkle". Similarly rough stones can also be cut into the most beautiful stone, despite heavy weight loss and lowered monetary value.

1. Well Cut:

When a diamond is cut to proper proportions and light is reflected from one facet to another and then dispersed through the top of the stone. Within the well cut standards are the ideal, excellent and very good categories.

Ideal Cut: This Cut combines the best in brilliance and fire.
Excellent Cut: Exhibits great beauty yet with a slight flexibility of percentages.
Very Good Cut: This range of cut balances precise proportions and price considerations.

2. Deep Cut:

If a diamond is cut too deep, light escapes through the opposite side of the pavilion.

3. Shallow Cut:

With a shallow cut, light escapes through the pavilion before it can be reflected.

The cut or proportions of a diamond is measured in percentages relative to the diameter of its girdle. The girdle diameter is always considered to be 100%. Supposing the Girdle diameter is 100%, the table is 5.6mm and the total depth is 6.1mm. Thus the diamond has a table of 56% and depth of 61%.