A Guide to the Popular Diamond Shapes

There is no denying that the shape of the diamond contributes to its appeal. However, not all of them are made for everyone. Each of them are made with a certain distinct feature, quality, cost, and appeal. That is why it is important to know some of the basic information about the diamond shapes that will fit perfectly for you or your loved one. With the following guide below, we will help you easily slide into the diamond just as you need it.

But before anything else, it is important to note the length to width ratio. The ratio will be predominantly used in this article to determine how proportionate the diamond is in its intended shape. This is measured by dividing the length of the diamond by width. For example, if a diamond has a length of 5mm and a width of 3mm, the length to width ratio is 1.67.

The Most Common Diamond Shapes

Asscher Cut Diamonds

Produced by its namesake, the Asscher Cut Diamonds, originated from the Asscher Brothers living in Holland in 1902. It has only recently regained popularity; specifically in 2002 after the celebration of its centennial year. The Asscher diamond is considered as a dazzling alternative to the Emerald Cut for those who prefer a smaller table and more layered facets. These facets, seen underneath the table, are also the source of its brilliance due to its light reflection. Furthermore, its trimmed corners give the diamond extra style and stability.

Recommended ratio: 1.0 – 1.05

When buying the Asscher Cut diamond, it helps to know that it doesn’t mask the color of the diamond’s rough material. A reason for this is that Asschers are cut for their clarity and luster, so nothing is definitely hidden. So when buying, it is recommended to go for a minimum of an H color.

Cost: Around $3,000

Baguette Diamond

Baguette Diamonds are popular for having 24 parallel facets with remarkable clarity. As expected of its namesake, it is rectangular in shape with step cutting; making it ideal for vibrant ring centerpieces and side stones. It is also usually available in smaller sizes, which are perfect when it comes to looking for an accent to another stone of as part of a wedding band. Furthermore, the long bar shape of the Baguette can highlight an exceptional size even with its low carat.

Recommended ratio: 1.50 – 2.40

When buying Baguette Diamonds, it is important to ensure that there are no noticeable inclusions contained in the diamond.

Cost: Around $3,000

Cushion Cut Diamonds

Cushion cuts look exactly like the name: a cushion. This is the case due to its look that it seems like a combination of a square shape and rounded edges. The Cushion Cut is also known as the shape that beams with fire because of its precise bending and dispersion of light. Furthermore, unlike other diamond shapes, it is very flexible with design. It can be modified with many variations from standard to modern.

Recommended ratio: 1.0 -1.09 (Square); 1.15 – 1.25 (Rectangle)

When buying Cushion Cut diamonds, it is best to stick to Cushions with a depth under 70% and a table under 70% as well. This is to ensure that brilliance and fire are maintained.

Cost: Around $3,000

Emerald Cut Diamonds

Emerald Cut diamonds are, as its name states, cut using the technique originally used for emeralds. They have a large table surface and offers abundant reflections through their long and straight lines called steps. It is prominently available in square or rectangle. And if you want to show off the size of your diamond better than other in the same carat category, then we recommend buying the Emerald Cut diamond. This is also best suited for those who want a larger piece without the heavier price tag.

Recommended Ratio: 1.30 – 1.60 (Traditional cut); 1.50 (Popular choice)

When buying Emerald Cut diamonds, it is advisable to go for a VS1 or VS2 since its inclusions may be more noticeable due to its large table.

Cost: Around $3,000

Heart Shaped Diamond

Being the romantic shape bearing the symbol of love, the Heart Shaped Diamond is ideally and commonly placed in a ring, pendant, or other jewelry. It also comes in a range of slenderness and width according to the person’s preference. However, it should be regarded how a well-cut Heart Shaped Diamond should be symmetrical with its point or cleft distinct for it to appear balanced and full.

Recommended ratio: The lower the ratio, the chubbier the heart will look. It is recommended to start at 1.00 (length). For those above 1.10, the Heart will look stretched.

When buying a Heart Shaped Diamond, it is advisable to purchase it in a higher carat such as 1 or 3. This is due to its form that when bought in a smaller carat weight, a three-prong setting will highlight the outline of the heart.

Cost: Around $3,000

Marquise Diamond

The origin of the Marquise Diamond dates back to the time of King Louis XIV who requested to have the diamond mimic the shape of his mistress’ mouth. Even with this shocking fact, the Marquise Diamond has remained to be a flattering and delightful choice over the years. The look of this diamond resembles to that of an elongated eye’s shape. The stunning large crown also complements the wearer’s fingers making it appear longer and more slender. Furthermore, the elongated figure of the Marquise makes the stone appear larger compared to other shapes within the same carat category.

Recommended ratio: 1.70 – 1.20

When buying a Marquise Diamond, you should take a closer look at the symmetry. Since it has a unique structure, make sure that the two pointed ends align almost perfectly with each other.

Cost: Around $3,000

Oval Diamonds

Oval Diamonds are known for its similar fire and brilliance to that of the Round Cut. However, unlike the Round Cut, this is perfect for those who wish to wear a unique shape at a lower price pout. Oval Diamonds have elongated silhouettes that offer a large appearance in comparison to other shapes within the same carat category. It is also considered to be durable due to the absence of pointed edges.

Recommended ratio: 1.30 – 1.50

When buying an oval diamond, look for the severity of the bowtie just like in the Pear Shaped Diamond.

Cost: Around $3,000

Pear Shaped Diamond

The Pear Shaped Diamond has been regarded for its elegant and timeless quality. Its features include a rounded side that narrows to a distinct point. When using, it is usually placed with the end point pointing to the direction of the wearer’s heart. Also, since Pear Shaped Diamonds are known for their shape and equal shimmer, symmetry is critical. Furthermore, it is a good choice for an engagement.

Recommended ratio: 1.45 – 1.75 (Classic Length)

When buying the Pear Shaped Diamond, you should watch for the severity of the bowtie. This is the dark area that runs across the center of the diamond. Have it looked by an expert to determine whether the bowtie is too prominent within the piece.

Cost: Around $3,000

Princess Cut Diamonds

A close second to Round Brilliant Cut diamonds in terms of popularity, the Princess Cut Diamonds are created from the inverted pyramid of the rough diamond stone. It also achieves greater brilliance fire compared to other diamonds with similar shapes. While it is traditionally square, there are also rectangular Princess Cut Diamonds available. Furthermore, the Princess Cut is known to give the same brilliance as the Round brilliant cut; however, this time it is seen in its square outline.

Recommended ratio: 1.0 – 1.05 (Square); 1.5 – 2.0 (Rectangle)

When buying, the Princess Cut Diamond should be set with prongs on all four corners to prevent damage to the corners. It is also recommended to choose a Princess Cut with inclusions toward the edges since inclusions can generally be hidden by the prongs.

Cost: Cheaper than Round Brilliant Cut Diamonds with a price range of around $3,000

Radiant Cut Diamonds

The dazzling brilliance and fire of the radiant Cut Diamond brought it to prominence during the 1980s. It is considered as an enchanting choice because of its numerous facets placed around its pavilion and crown. Radiant Cut Diamonds, due to its cropped corners, make it suitable to pair with rounded or square diamonds.

Furthermore, Radiants usually appear like cracked ice. This is mainly due to its many facets and angles, which easily hides the flaws and inclusions. Also, the beveled corners of Radiant Cuts allow for more stability; making it suitable for wearers with active lifestyle.

Recommendedratio: 1.0 – 1.05 (Square); up to 2.0 (Rectangle)

When buying Radiant Cut diamonds, you have to know that the color differences are harder to perceive than in other diamond shapes. It is, therefore, preferable to have an H color grade.

Cost: Around $4,000

Round Brilliant Cut Diamonds

This diamond shape is probably the most popular out of the rest. The Round Brilliant Cut diamond contributes to almost two-thirds of the diamonds sold. This popularity can be traced back to 1919 when Marcel Tolkowsky published “Diamond Design: A Study of the Reflection and Refraction of Light in Diamond”. In this book, Marcel explained the ideal angles for a diamond to produce the highest level of brilliance and fire. And at the center of this explanation is the Round Brilliant Cut. This diamond accounts for 58 facets including its cutlet; a reason of its incredible brilliance.

Furthermore, the Round Brilliant Cut is known for its timeless look and quality. It provides exceptional brilliance; making it a perfect choice for engagement rings, necklaces, and other fine pieces.

Recommendedratio: 1.0 – 1.03

When it comes to buying Round Brilliant Cut diamonds, you should take note of the cut quality, since it is responsible for much of its beauty. To do this, you must always refer to its review ratings such as GIA reports. Also, it is always a good idea to ask help from an expert.

Cost: Roughly $4,000

Trillion Diamond

Trillion Diamonds also known as Trilliant diamonds are one of a kind and enchanting. Its shape is considered as hard to point out; making it a good one when it comes to garnering impressions. It is different than round, square, or rectangle shape. Also, Trillion Diamonds are known for their rich brilliance and deep fire; diverging from popular shapes while retaining its exquisite quality. They are considered for their prominence as centerpieces of an engagement ring or as complementary side stones.

Furthermore, the Trillion Diamond’s strongest asset would be its personality. This is due to the sharp and unique features that create a dashing look which maximizes the Trillion’s immense width. That is why Trillions tend to look larger compared to other diamonds with the same carat category.

Recommendedratio: 1.0 – 1.10

When buying a Trillion Diamond, make sure that the edges are protected when setting it. The inclusions, if ever they come with it, are likely to be hidden by the prongs or a jewelry border.

Cost: Around $5,000 (High Quality-Very Good Cut, G Color, VS1 Clarity)

Difference between Diamond Shapes and Diamond Cut

To the common eye, diamond shapes and diamond cut have no noticeable differences. Most people even interchange the two. However, contrary to popular belief, these two are quite distinct.

Diamond shapes pertains to the outline or the external figure of the diamond. Just as we’ve discussed above, they refer to the actual shape of the appearance of the diamond.

On the other hand, diamond cut refers to the facets, symmetry, dimensions, and reflective qualities of the diamond. The cut can be shallow, deep, dull, or brilliant. Also, it helps to note that the finer the cut, the greater the brilliance and fire of the diamond.


Ultimately, understanding the basics and features of each diamond shape helps you find the right one for you and your loved one. It is true that with the variety of options and shape sizes out there, choosing the best one can be hard and confusing. So now, with the new found knowledge you equipped yourself with today through this article, we hope that you now have a good idea of what diamond shape to choose. Also, while it may seem that these shapes are catered for a certain person, it is important to note how the best way to determine what is right for you are your own preference. Every person have their own unique and special style depending, of course, on the occasion. With this article, we trust that you will make the right decision and choice. However, if you are still unsure about everything through all of these, then don’t hesitate to contact an expert for a consultation. After all, diamonds are an investment both in your money and time.

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Kevin Lee is a former tech advisor who cut his teeth in Silicon Valley. He now spends his time sharing his passion for investing in diamonds and jewelry. You can reach Kevin for any comments by using this form.