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Round Brilliant Cut

The Round Brilliant Cut is an iconic and widely recognized gem cut, known for its exceptional brilliance and fire. This cut is often used for diamonds and other gemstones due to its ability to maximize light reflection and dispersion. Here’s a detailed description:

The Round Brilliant Cut is a symmetrical and circular gemstone cut with 57 or 58 facets, designed to optimize the gem’s light performance. It is characterized by a flat table on top, a pointed culet at the bottom, and a series of triangular and kite-shaped facets arranged around the girdle (the widest part of the gem).

Key Features

1. Crown: The crown of the Round Brilliant Cut consists of a table (the flat top surface), a series of bezel facets (triangular facets surrounding the table), and star facets (kite-shaped facets between the table and the girdle). These facets work together to capture incoming light and reflect it back to the viewer’s eye.

2. Pavilion: The pavilion is the lower portion of the gem below the girdle. It includes a series of facets, including lower girdle facets and pavilion main facets. These facets are designed to reflect and refract light, enhancing the gem’s brilliance and dispersion.

3. Girdle: The girdle is the widest part of the gemstone, separating the crown from the pavilion. It serves as the gem’s outer edge. The girdle can vary in thickness and may be polished, faceted, or left unpolished, depending on the gem’s design.

4. Culet: The culet is a small facet at the bottom of the gem’s pavilion. In modern cuts, the culet is usually very small or even absent, allowing light to be reflected back through the table. In older cuts, larger culets were more common.


* The Round Brilliant Cut is designed for maximum light return, making it highly brilliant and lively.

* Its symmetrical shape is versatile and works well with a wide range of gemstones, including diamonds, sapphires, and more.

* This cut tends to hide inclusions and imperfections better than other cuts, making it a popular choice for diamonds.


* Due to the extensive faceting, a significant portion of the original rough gemstone is lost during the cutting process. * The Round Brilliant Cut is highly standardized, which might limit the creative potential for unique gemstone designs.