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Diamond Anatomy 101


Identifying Parts of a Diamond
Learn about the different parts of the diamond, including the crown and pavilion, girdle, table, facets, depth and depth percentage.
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Welcome to Diamond Anatomy 101!

In this brief tutorial, we are going to go through the various parts that make up an entire diamond. Once you have learned some of the basics, you will understand what’s going on when you read about the crown, the depth, and so on. So, let’s get started!

First off, let’s divide the diamond into two parts.

The top part is called the crown while the bottom part is known as the pavilion. These two parts are separated by the diamond’s girdle.

The girdle is the widest section of the diamond, and is also referred to as the diameter.

Now that you know the basic sections of a diamond, let’s take a closer look.

The flat planes that cover the entire diamond are called facets. The facets are the windows that let light in and out. The facets also help light reflect off the diamond.

The largest facet on the diamond is at the top of the crown and is known as the table. This is the facet that you look into when looking down on a diamond. The table is measured as a proportion of the diameter and is documented as the table percentage. A properly proportioned table allows enough light in and out to create the brilliance and sparkle we come to expect from a diamond.

At the bottom of the diamond, on the pavilion point, we find the smallest facet, which is known as the culet. The culet is sometimes little more than a point.

OK. Now that we have covered the crown, the pavilion, and the other basic parts, we can measure the diamond’s depth.

The depth is the actual height of the stone measured from the table down through to the culet. This measurement is used to find the depth percentage, which is what the diamond cutter needs to know in order to properly angle and place the facets. The depth percentage, as it affects the angle of the pavilion facets, is a contributing factor in the amount of sparkle the stone has.

The last part of this basic diamond anatomy lesson is to take a closer look at the facets.

It is important to know that facets are not all the same shape. The basic facet shapes are the Kite, the Rectangular, and the Star.

Kites are facets that are cut into small kite-like shapes. The Rectangular facets are just that – either square or rectangular in shape. Star facets are triangular.

So that’s it! Now you can identify the various parts of a diamond.

When all these parts are in balance with each other, the diamond will have minimum light leakage, which diminishes its shine, and will sparkle brilliantly.

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