The “Round Cut” Diamond Shape Explained (Buying Guide)

Julie Janecka
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What Is A Round Cut Diamond?

The “round cutshape is one of the most common diamond shapes, and there are two reasons for this. Firstly, it looks good. It is reasonably priced (when compared to fancy shapes) and fits into most jewelry settings. The second reason it is so popular is it is the easiest shape to cut and is suitable for most types of diamond mining and production systems. Because it is easy to produce, this shape makes up the overwhelming majority of diamonds that you will find for sale.

Despite its popularity, though, the round cut diamond is easily misunderstood, and as such is can be risky to purchase. It is popular because it is a cut that looks good, and fits into most jewelry settings. However, if you want to get a diamond that maximizes its stone clarity and sparkle, it may be wise to look at the different diamond cut variations in addition to the round cut.

This guide will help you understand what you get with a round cut diamond, and whether it is the best diamond for you.

Pros And Cons of Round Cut Diamonds

The round cut diamond shape is by far the most popular and most familiar of diamond shapes, yet some individuals are not familiar with its history. Round cut diamonds are said to be the new diamonds in that they recently first came into favor around the early 1600's to the early 1800's. The round brilliant cut diamond was designed to mimic the appearance of fine flawless pearls, but with impactful beauty.

The round diamond-shaped gemstone is considered to be the most beautiful and classic of all diamond cuts. A round cut diamond has 57 facets. The cutter of the diamond uses a machine that ensures that the tips and edges of the diamond are very well cut. The cutter must pay special attention to the table of the diamond as well as the positioning of the outer edges and points of the diamond in an even pattern. The overarching goal is to precisely control the amount of light reflected back out of the diamond. Round cut diamonds are both brilliant and sparkling, but are they the best choice for your needs?

As discussed here, the unique cut and large number of facets of the round cut diamond reflect light throughout the diamond, resulting in a diamond that sparkles and shines each time you look at it. These cut options are a great choice for a diamond engagement ring, but they are also great for other members of your family. In this post, we will discuss the round cut, and how you can recognize this popular diamond shape when you are searching for your next diamond purchase.

Pros

Round cut diamonds are the most popular diamond shape due to the fact that they have the maximum amount of sparkle and fire. Round diamonds have the highest light refraction compared to all other diamond cuts. Their shape allows for maximum amount of light to pass through them and create the brilliance for which diamonds are known.

With their popularity in mind, let’s take a look at a few of the pros and cons of buying a round cut diamond.

Pros of round Diamond Shapes

The brilliance of a round cut diamond is dependent upon its cut, polish and symmetry. The round cuts have the highest brilliance which makes them the favorite of many. These factors play a substantial role in making the diamond sparkle and shine. They allow light to bounce off the diamond both laterally and in a vertical direction, creating the fire in the stone.

The round cut is available in a variety of diamond sizes, which makes it accessible to a wide range of buyers. They also work well with different type of settings such as solitaire, halo and cluster.

Cons

Istent, Sparkly, and Tiffany Green.

The popular “round cut” shape of diamonds is the traditional shape most diamantaires use when making setting for a diamond.

It’s the universal recognized shape for diamonds and the most commonly used shape.

The round cut diamond is ideal for small and large diamonds. The shape is incredibly symmetrical with a brilliant sparkle and mirrors the round shape of the sun and the moon which is why it became popular.

The round cut shines brighter than any other diamond shape. It is symmetrical and flawless. When it comes to shape, the round cut diamond is the toughest to mess up.

Tiffany, which is a high-end jewelry brand, predominantly uses square cut diamonds in their jewelry collections, including the much-loved Tiffany engagement rings.

More recently, not only has the shape of the diamonds been important (size, color, chemical composition), but so has the cavity style.

Many diamond professionals recommend purchasing smaller round shapes than marquise, pear, oval, emerald, and other shapes. The demand for these smaller, round shapes are increasing due to the significance they add to the ensemble when worn as a ring or bracelet.

How To Choose A Round Cut Diamond?

The round cut diamond is the most popular diamond shape and it’s instantly recognisable because it mimics the appearance of the sun. You can have rainbow reflections and fire from a round cut diamond, depending on the cut, quality and price. But the round cut is also known for its ability to reflect light and other subtle property. And because the typical round cut diamond shape is so popular, it’s often the go-to diamond shape for engagement rings because they are great at symbolising eternal love.

If you’ve ever wondered why a round cut diamond is called a round cut diamond, that’s because it’s the shape of a circle (or more accurately a cylinder). Since most of us aren’t used to thinking of a cylinder as a diamond’s shape, it’s not hard to see why the round cut diamond is unique.

The fact that it’s unique is one of its biggest selling points. It’s instantly recognisable and stands out among other diamond shapes in terms of its beauty. But even though a round cut diamond is instantly recognisable, some of us don’t know that it actually has a name.

Cut

Just as a diamond is graded according to its carat weight, color, and clarity, it is also categorized according to it overall shape.

The cut of a diamond is the most important factor when it comes to how much light it reflects and refracts. A diamond must maximize its total surface area while the girdle and other parts of the diamond remain as narrow as possible. The angles of the facets and the proportions of the face must be perfect for a diamond to produce as much brilliance and clarity as possible. So if you want to buy a diamond at the best price, it’s definitely worth doing a bit of research to help you spot potential bargains.

Perhaps the most important quality of a diamond’s cut is its shape. Diamonds come in a wide variety of shapes, although the most popular is the round diamond. There are round diamonds in different cuts, which brings us to the cut rating of the round diamonds.

The diamond can be enhanced further through the art of polishing, which adds exceptional shine and brilliance to the diamond. A diamond can have either a polished (or squared) finish or a faceted finish. The fullest cut diamonds have diamond faceting and are a step below an excellence cut.

Clarity

Color Diamond Shape.

Your hand is often the only tool you need to tell between round and princess cut diamonds. Round and princess cut diamonds are the most popular gemstone shapes for engagement rings, finger rings, pendants, earrings, brooches, and necklaces. They are available in a variety of sizes and quality.

When it comes to diamond cuts, the first thing you need to consider is the diamond cut quality. At a higher quality, you'll see a lot of sparkle from reflected light. At the higher quality, you'll also see more sparkle from direct light.

Diamond Shape Is Related to Diamond Cut Quality

Because diamond cut quality is directly related to the shape of a diamond, we'll take a brief look at diamond shape first. The shape of a diamond is an approximation of a sphere, with its corners cut flat and its edges angled smoothly.

With the exception of the emerald cut diamond, round and princess cut diamonds can have almost every possible shape.

Round Cut Diamond Is the Most Popular Diamond Shape

The round cut diamond shape, also referred to as a brilliant cut diamond, is the best-known shape for diamond engagement rings. It is also the most popular. It is a symmetrical, evenly proportioned shape that is ideal for any type of jewelry. It reflects a high level of craftsmanship and affords a brilliant finish.

Color

While "cut" is the most important factor in determining the sparkle and brilliance of your diamond, it has no bearing on carat size and quality-cut is more important with smaller carat diamonds than big diamonds. According to GIA, there are 4 crucial elements that define the quality-cut of a diamond, which are:

{1}. Polish (Symmetry): Refers to reflectivity
{2}. Symmetry (Polish): Refers to presentation or uniformity of the reflective surface
{3}. Girdle: The border between the upper and lower parts of the diamond

This is the reason why most diamond buyers prefer high quality to high carat weight, because an expertly cut diamond of smaller carat weight can look bigger and more expensive than a poorly cut diamond of bigger carat weight.

Carat

Weight and Cut: The “Round Cut” Diamond Shape

Buying a round cut diamond can be a bit baffling with the vast array of choices on the market. Every diamond you see comes in a round cut and most come in a round brilliant cut. How can a consumer know they are getting a quality product?

Carat weight and cut should factor in heavily when determining the quality value of a diamond. The diameter of a diamond is the measurement across its surface. According to the system of the Gemological Institute of America (GIA), there are four different grades on this measurement. The table below provides a visual representation of the various grades.

From these pictures it’s easy to see that a GIA, “ideal cut”, is the best choice on all accounts. To determine a diamond’s cut grade, look at its proportions. You are looking for good symmetry, proportions, and polish. It is important to note that the proportions vary greatly from diamond to diamond and within the diamond. A diamond is not graded by its cut quality alone; it is graded by its overall appearance, its cut, and its proportions.

Round Cut vs Other Diamond Cuts

Diamonds are available in a broad range of shapes, which are influenced by many factors that you’ll learn all about in this article.

The two most popular round cuts are the Princess Cut and the Oval Cut and since they’re available in a broad price range, most diamond shopper fall into one of the groups below.

Budget-conscious shoppers typically choose the more affordable round shaped diamonds, like Princess Cuts. In fact, more than 65% of all diamond sales fall into this category. Budget shoppers are typically looking for overall quality in a diamond, as opposed to focusing on the cut.

Connoisseurs, who are typically more experienced at searching for the best diamond cut quality, choose the perfectly proportioned and most reliable diamond cuts. Connoisseurs look for the most beautiful, and the most reliable diamond cuts, like the Oval Cut and the Radiant Cut.

If you’re shopping for someone you love, and you’re thinking about choosing one of the most popular diamond cuts, you know that the shape of the diamond you’re considering makes a difference in the overall beauty, brilliance, and longevity (hardness) of the diamond. That’s why we’re going to take a closer look at diamond shapes and what they mean to you.

Round vs Princess Cut

The main difference between a round cut and a princess cut diamond is the shape of the diamond. There are no major differences between the two in terms of beauty, brilliance, and luster. Round and princess diamonds both reflect light in a sparkling manner that makes them perfect gems for jewelry.

The main difference between a round and princess cut diamond is the shape of the diamond, although size also plays a part. Round diamonds and princess cut diamonds are available in similar sizes. If the round diamond is cut correctly, the diameter of the crown will be the same size as the diameter of the diamond when it is on its side.

Establishing the correct proportion between the length and width is crucial in cutting a diamond. Applying the correct proportions in cutting will guarantee a profusion of brilliancy. Diamonds that do not have the correct angles between the crown and pavilion will make the diamond lose its brilliance. There is a width to length ratio that is considered to have the most brilliance to sparkle. A crown that is twice as wide than the pavilion produces more brilliance and gives more light to the diamond.

A diamond can be cut to have different styles and shapes, but if there is a cut that looks best with the size of the diamond it is called the Ultimate cut.

Round vs Princess Cut

The main difference between a round cut and a princess cut diamond is the shape of the diamond. There are no major differences between the two in terms of beauty, brilliance, and luster. Round and princess diamonds both reflect light in a sparkling manner that makes them perfect gems for jewelry.

The main difference between a round and princess cut diamond is the shape of the diamond, although size also plays a part. Round diamonds and princess cut diamonds are available in similar sizes. If the round diamond is cut correctly, the diameter of the crown will be the same size as the diameter of the diamond when it is on its side.

Establishing the correct proportion between the length and width is crucial in cutting a diamond. Applying the correct proportions in cutting will guarantee a profusion of brilliancy. Diamonds that do not have the correct angles between the crown and pavilion will make the diamond lose its brilliance. There is a width to length ratio that is considered to have the most brilliance to sparkle. A crown that is twice as wide than the pavilion produces more brilliance and gives more light to the diamond.

A diamond can be cut to have different styles and shapes, but if there is a cut that looks best with the size of the diamond it is called the Ultimate cut.

Round Cut vs Cushion Cut

The round shaped diamond cut was the first and original diamond cut created by Marcel Tolkowsky, a Polish/German mathematician and engineer, in 1919. Since then, the round cut diamond has been the most popular diamond cut for engagement rings. Today, there are many variations of the round cut diamond, including the princess cut, cushion cut, and oval cut.

Where To Buy The Best Round Cut Diamond?

Round cut diamonds are the most popular cut for diamonds and rounds (diamonds that have been cut into a circular shape).

Buying a round cut diamond can seem like a complex decision because of the various shapes, sizes and performance characteristics of round diamonds. The main factors we are going to consider in this short post are the shape and size of the diamond. We'll also touch on the topic of buying and grading. We'll look at these factors together and then look at round cut diamond grades specifically.

Why is understanding the Round Cut so important?

If you don't understand the Round Cut, you may be paying more than you have to.

As it stands right now, the public generally does not understand what they are paying for when looking to buy a round cut diamond. There is a lot of confusion out there. One of the main reasons for this is because the jewelry industry uses SI units (fractions and decimal places) when measuring diamonds and then converts all measurements to a man-made scale (carat, points, millimeter equivalents, etc) to make for easier communication. For example, if a diamond was measured at 1.10 carats, that diamond would be considered 10 points.

There is only one scale that utilizes only units of measurement.

What Are The Best Settings For Round Cut Diamonds?

When it comes to diamonds, you've probably heard the terms “brilliant cut” and “round cut”. But what do they mean? And which one should you get for your ring?

A round cut gemstone doesn't have to be round. It's just referred to as "round cut" because of the shape of the faceting. So instead, it's more like a rectangular shape with rounded corners; the rectangle itself can be of any length but its width is what gives it its shape.

Round cut gemstones are also often called "emerald cuts" and "marquis cuts". These are basically just other nicknames to identify a round cut gemstone with other common shapes.

How are round cut diamonds formed?

Round cut diamonds are typically formed with a diamond cutter using a "glory machine". This cutter allows for precision and uniformity in the creation of round cut diamonds. However, due to the way the gemstone is cut, it can be problematic for a round cut diamond to be used as a center stone in a ring. This is because they have a tendency to tilt.

Learn More About Jewelry

Every diamond is cut and polished to possess individuality and character. Unlike other gemstones, diamonds have to be cut and polished in order to maximize their brilliance.

The cutting and polishing process determines how light interacts with the diamond. When the diamond is cut properly, light enters the middle of the diamond, making it sparkle.

When choosing a diamond, it’s important to understand the different ways it can be cut. While you’ll come across many different varieties, there are three basic shapes that you will see when purchasing a diamond – the round cut, the princess cut and the oval cut.

A diamond is perfectly round if it’s cut to a specific formula and proportion. Round diamonds come in a variety of sizes and your diamond will be judged by the way it is cut. A well-cut round diamond will have maximum brilliance and fire.