What is Diamond Cut?

Diamond cut refers to how well a diamond is shaped and polished from its rough form into its final state. It is one of the most critical aspects of a diamond's quality because it affects its brilliance and sparkle. A diamond cut is not just about its shape but how well its facets interact with light. A well-cut diamond will reflect light both internally and externally, creating the dazzling sparkle diamonds are known for.

Diamond Anatomy

Table

The table is the largest, flat facet on the top of a diamond. It plays an essential role in how much light enters the diamond. A larger table allows more light in, which enhances brilliance. Still, if it's too large, it can detract from the diamond's sparkle.

Crown

The upper part of a diamond above the girdle is known as the crown. It includes the table, the flat top surface, and the facets that slope downward from the table. The crown plays a significant role in how light enters the diamond and disperses, contributing to its brilliance and fire.

Girdle

The girdle is the thin edge that forms the outer perimeter of the diamond, separating the crown from the pavilion. It can be thick or thin, and while it doesn't impact a diamond's appearance as much, it's essential in determining the diamond's durability, as it protects the edge from chipping.

Pavilion

The pavilion of the diamond is the lower part beneath the girdle. This area extends from the girdle to the bottom point or culet. The pavilion is crucial because it reflects light up through the crown, influencing the diamond's brightness and overall appearance.

Depth

A diamond's depth refers to the distance between the table and the culet. It is expressed as a percentage of the diamond's overall diameter. The correct depth allows for the proper balance of light reflection and refraction, making the diamond appear lively and brilliant.

What are Diamond Facets?

Diamond facets are the flat, polished surfaces that make up a diamond's shape. Facets are crucial to how a diamond interacts with light, contributing to its brilliance, fire, and scintillation. Depending on the design, a diamond's cut typically consists of 57 or 58 facets. Each facet is positioned to capture and reflect light to maximize the diamond's beauty.

Diamond Cut vs Diamond Shape

Diamond cut and diamond shape are often confused, but they are distinct concepts. Diamond shape refers to its physical form (e.g., round, oval, or princess). On the other hand, diamond cut refers to how well a diamond's facets are cut and arranged to interact with light. While the shape is about the overall appearance, the cut influences how much a diamond sparkles.

What is Diamond Cut Grading?

Diamond cut grading assesses how well a diamond has been cut. The Gemological Institute of America, also known as the GIA, grades diamonds based on how they reflect light and their proportions. Cut grading ranges from Excellent to Poor, directly affecting the diamond's brilliance and value.

Excellent

An excellent cut diamond reflects nearly all the light that enters it, producing maximum brilliance and fire. This grade is considered the pinnacle of diamond cutting.

Very Good

A very good cut diamond reflects most of the light that enters it, resulting in exceptional brilliance and sparkle, though slightly less than an excellent cut.

Good

A good cut diamond reflects most of the light that enters it but allows some light to escape through the pavilion. These diamonds still have good brilliance but are less radiant than higher-cut grades.

Fair

A fair cut diamond allows a significant amount of light to escape, resulting in less brilliance. These diamonds may appear less sparkly but are often more affordable.

Poor

A poor cut diamond reflects very little light, appearing dull or lifeless. Poorly proportioned, these diamonds lack the brilliance that makes diamonds so attractive.

What are Different Diamond Cuts?

There are three main types of diamond cuts, each designed to enhance different qualities of the diamond:

Brilliant Cut

The brilliant cut is designed to maximize brilliance and sparkle. It typically has 58 facets. The most common example is the round brilliant cut, which is the most popular diamond cut worldwide.

Step Cut

Step-cut diamonds feature rectangular facets parallel to the girdle, creating a sleek and elegant appearance. The emerald and Asscher cuts are popular step cuts, emphasizing clarity over brilliance.

Mixed Cut

A mixed cut combines the best elements of brilliant and step cuts. It often includes brilliant faceting on the crown and step faceting on the pavilion. The princess cut is an example of a mixed cut, offering brilliance with a square shape.

What is the Best Diamond Cut?

The best diamond cut depends on personal preference and desired appearance. However, the round brilliant cut is widely considered the best for maximizing brilliance and sparkle. Its ideal facet arrangement effectively reflects light, making it the most popular choice for engagement rings.

Ultimately, the best diamond cut balances personal style with the brilliance, fire, and scintillation qualities you value most.