Diamond Anatomy: The 7 Alluring Components

by DMNDS | Last Updated: March 28, 2020

Diamond anatomy is the structure of the stone. The anatomy establishes the unique character via facets, angles, size and proportions. These features relate directly to the stone’s shine and brilliance. As doctors research human anatomy, so should prospective diamond buyers study the anatomy of the precious gem.

Diamond Anatomy Broken Down

There are 7 main components that we will outline below which make up the diamond anatomy. In these examples, we will be using the round brilliant diamond cut.

The Crown

diamond anatomy

The crown is the angled top portion of the diamond. It is measured from the uppermost edge of the girdle (the point at which the crown and the pavilion meet) to the table (the smoothest flat surface on the uppermost side of a diamond). The facets of a crown are often referred to as the windows of a gemstone, as they process the incoming light entering the diamond and illuminate its brightness.

The Culet

diamond anatomy

The culet is the lowermost tip of a diamond. It serves the purpose of reducing any abrasion and chipping on the lower part of the stone. In most cases, a culet is not meant to be visible to the naked eye. However, an improperly cut stone can have a visible cult. A large culet will cause excess light to escape from the bottom of a stone, instead of reflecting the shine back to the upper angles. When possible, avoid large culets.

The Depth

The depth, i.e. the height, of a diamond is always measured from top to bottom, table to culet. You will often come across a depth percentage, which is dedicated to establishing the impact of light, reflecting off any of the other facets inside of the stone. Depth varies stone to stone with an optimal numerical value for each.

The Diameter

As we know from math, the diameter of a shape is a straight line that passes through the center of the shape. The same goes for a diamond. The diameter serves the purpose of measuring the impact of the stone’s sparkle. It is measured by the width of a fully polished stone from edge to edge.

The Girdle

The girdle is the locale at which the pavilion and crown meet on the lowermost side of the stone. In most cases, you should look out for diamonds that have thin girdles, as this can increase the likelihood of chipping and abrasion. Conversely, if the girdle is too large, the diamond itself will appear to be of a smaller size.

The Pavilion

The underside of the diamond or bottom half of a stone is called the pavilion. The facets of a pavilion serve to provide additional brilliance as light bounces off of the inner facets.

The Table

The table of a diamond is a flat facet that you can clearly recognize if you look at the diamond from above. It is also often called, “the hat” and is crucial to the entire color and brilliance of the stone, as it has the largest light-inviting form.

The Most Important Part of A Diamond’s Anatomy

While each part of the diamond anatomy serves a distinct purpose, the depth, diameter and table are three components that stick out the most during evaluation.


Understanding the basics of diamond anatomy is helpful when shopping. Speaking the vendor’s language can go a long way in saving you unwanted hassle. Now that we have covered everything from the role of a cut in the anatomy to their components: crown, culet, depth, diameter, girdle, pavilion, and table, if you are interested in learning how a diamond is certified, check out our diamond certification guide.