Diamond Cut

Diamond Cut

The cut is one of the most defining characteristics of a diamond. Diamond cut is the summary of a diamond’s proportions evaluated using the attributes of fire, brilliance and scintillation. High grades of color, clarity, and carat weight affect a diamond, but it’s the cut that determines the symmetry of the stone’s facets.

It’s overall proportions, and its ability to reflect light takes all these aspects together. An expertly-cut diamond will achieve very high levels of brilliance and sparkle. Even if a diamond has a good color and clarity, a bad cut can still result in a poor looking diamond.

Key Points

  • Of the 4Cs, cut is the most important characteristic because it has the greatest influence on a diamond’s sparkle. Simply put, the better the cut grade, the more it will sparkle.
  • Even if a diamond has a perfect clarity and color grade, if it has a poor cut, it may appear dull.
  • Gemologists recommend choosing the highest cut grade within your budget. Very Good or better, if possible.

A diamond is typically composed of 5 parts.

Table, Crown, Girdle, Pavilion, and Cutlet


The largest facet of the diamond, a table is the flat surface on the top of the stone, resembling a ‘table’.

A diamond’s table is the largest facet of the stone, comprising the flat surface on the top. The table percentage is the ratio of the width of the diamond’s top facet in relation to the width of the entire stone. The right ratio results in a large amount of fire and brilliance.



The crown is  the top portion of the diamond, located above the girdle and extending below the table.

A diamond’s crown extends from the top of the stone down to the girdle. Crowns can be comprised of step cut facets or brilliant cut facets. These facets really make your diamond sparkle!



Forming the outer edge of the diamond, this is where the crown and the pavilion meet and is the widest part of a diamond.

This is the portion of the diamond between the crown and the pavilion, essentially spanning the width of the stone from side to side. The measurement of the girdle represents the perimeter of the diamond. A diamond’s girdle can be rough, polished, or faceted, and does not typically affect the quality or appearance of the stone.



Located at the bottom of the diamond, the pavilion bridges the girdle and the culet.

Located between the girdle and the culet (point), the pavilion is integral to the stone’s light reflecting properties. A properly cut pavilion will allow the maximum amount of light to reflect from the surface of the stone. An excessively deep or shallow diamond can cause light to escape out of the bottom and sides, reducing its sparkle



The smallest facet of a diamond, the culet is located at the very bottom of the stone.

The smallest facet of a diamond, the culet is located at the very bottom of the stone. If the diamond ends in a point, the diamond grading report will show a value of ‘None’ for the culet designation. This small facet was originally intended to protect the diamond’s pavilion, although today’s settings are usually strong enough to render it unnecessary.