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The Round Brilliant Cut Diamond: Everything You Need to Know

The Round Brilliant Cut Diamond: Everything You Need to Know

Table of Contents

  • History and Evolution
  • Anatomy of Round Brilliant Cut Diamonds
  • Pros and Cons of Round Brilliant Cut Diamonds
  • Are Round and Brilliant Cut Diamonds the Same?


The world of gemstone craftsmanship unfolds a marvel known as the round brilliant cut diamond – a testament to the precision and artistry of diamond cutters. This cut is a masterpiece, meticulously designed to capture and reflect light, creating an awe-inspiring sparkle. Join us on a journey into the captivating realm of round brilliant cut diamonds.

History and Evolution

The history of the round brilliant cut diamond traces its origins to the 18th century, marked by monumental discoveries in the world of diamonds. Early diamond experts envisioned a magnificent stone and sketched blueprints for what would become the round brilliant cut diamond. However, the tools of their time couldn’t do justice to this brilliant cut.

It took nearly two centuries for a transformative breakthrough in the late 20th century—the creation of the first diamond-cutting saw revolutionized the crafting of these precious gems.

Renowned for his 1919 book “Diamond Design,” Marcel Tolkowski played a pivotal role in defining the ideal proportions for a round brilliant cut stone. His work discarded imprecise tools, making way for highly precise lasers that revealed the true perfection of the round brilliant cut.

Anatomy of Round Brilliant Cut Diamonds

A round brilliant cut diamond is not just any round diamond. It’s a brilliant-cut gem, resembling two pyramids placed base to base, designed to maximize sparkle with minimal sacrifice in carat weight. This exquisite shape boasts 57 facets, with 33 on the crown and 25 on the pavilion.

Each facet of the diamond contributes to its overall appearance. The table facet, typically the largest, gathers light from above and either reflects it back to the observer or directs it into the diamond’s interior. The crown facets disperse light to create brightness, fire, and a mesmerizing play of light and shadows. The pavilion facets reflect light back through the crown, captivating the viewer’s eye. Together, these facets create a unique appearance for each diamond.

Pros and Cons of Round Brilliant Cut Diamonds


  • The round brilliant cut diamond maximizes light reflection, creating an unparalleled sparkle.
  • It offers a classic and timeless appearance, suitable for various jewelry styles.
  • The well-defined proportions make it easier to assess the quality of the diamond.


  • Round brilliant cut diamonds tend to be more expensive per carat compared to other shapes.
  • Some individuals prefer more unique or unconventional diamond shapes.
  • The brilliance of the cut can sometimes highlight imperfections in the stone.

Are Round and Brilliant Cut Diamonds the Same?

A round cut diamond and a round Brilliant Cut diamond are not the same. The terms “round” and “brilliant” are often used interchangeably, they are not precisely the same. “Round” refers to the shape of the diamond, which is circular. “Brilliant” describes the specific cut of the diamond, characterized by multiple facets that maximize light reflection. Therefore, a “round brilliant cut” diamond combines both a circular shape and a brilliant cut to achieve its exceptional sparkle.

Choosing the Perfect Round Brilliant Cut Diamond

Selecting a round brilliant cut diamond requires careful consideration of various factors. These gems typically range in price from $4,000 to $10,000 for a one-carat stone. Ideal settings for round brilliant cut diamonds often feature four- or six-prong settings.

To ensure you make the right choice, pay attention to the total depth percentage and table percentage. The total depth percentage is calculated as (depth ÷ average girdle diameter) x 100, while the table percentage is (average table size ÷ average girdle diameter) x 100. These proportions are essential when evaluating table size, total depth, crown height, and pavilion depth.

Round Brilliant Cut Diamond Rings

While we’ve explored the brilliance of round brilliant cut diamonds, it’s worth noting that when this exquisite cut graces a ring, it transforms into a symbol of timeless elegance and enduring love. The round brilliant cut diamond ring stands as a testament to the craftsmanship and a celebration of life’s most cherished moments. Whether it’s an engagement, an anniversary, or a declaration of love, this ring embodies the radiance of a lifelong commitment.

In a nutshell, the round brilliant cut diamond is a true masterpiece, with a history rich in innovation and determination. Its design is a triumph of light reflection, resulting in an unmatched sparkle. Whether you’re selecting an engagement ring or simply admiring its beauty, understanding what makes the round brilliant cut diamond special enhances your appreciation for this stunning gem.

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