What shapes do diamonds come in?

Whether they are grown by the earth or in a laboratory, all diamonds begin as a rough - an unformed diamond rock. These rough diamonds must be mapped and cut to be formed into a specific shape. Every diamond shape has its own unique look with characteristic features that set it apart from others. At Cullen Jewellery, we offer a range of high-quality diamond shapes that can satisfy any taste.

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The Round Brilliant Cut is by far the most popular shape of diamond. This classic design is cut with 58 facets, allowing the optimal amount of light to enter and bounce back out of the stone. For this reason, the Round Cut has the most sparkle out of all shapes. What’s more - a diamond’s imperfections are not as visible in a Round Brilliant Cut.


The Oval Cut is increasingly becoming one of the most popular shapes chosen for engagement rings. A unique take on the Round Brilliant shape, the Oval Cut Diamond is the ideal choice for those looking for something a little different. An Oval shape elegantly elongates the ring finger, adding the illusion of length with a beautiful amount
of sparkle.


The Emerald Cut Diamond is extremely popular for its precise symmetry and beautiful clarity. Looking into an Emerald Cut Diamond is like looking into crystal-clear water. Traditionally used solely on emeralds, what this step-cut diamond lacks in brilliance, it makes up for in purity. With such a clear, glass-like appearance, you are able to look directly into the facets of an Emerald Cut Diamond. For this reason, it is important to be aware that imperfections within the diamond may be more obvious to the naked eye.


The Radiant Cut Diamond is the second most brilliant stone, second only to the classic Round Cut Diamond. Combining the two different cutting styles of Round and Emerald, this unique cut is a non-traditional yet beautiful style. Available in a square or rectangular shape, a Radiant Cut Diamond features slanted corners which guard against chipping.


The Pear Cut Diamond combines the traditional brilliance of a round shape with the unique cut of a marquise diamond. The pear shape is a fiery cut, creating a dazzling sparkle with sophisticated lines that taper into a teardrop shape. This unique cut creates a slimming illusion on any finger and suits a number of both elaborate and simple settings. This elongated shape can have a number of length-to-width ratios, making this shape very versatile and customisable.


Available as either a rectangle or square shape, the Cushion Cut is quickly gaining popularity. A Cushion Diamond is a beautiful combination of a square and round shape with rounded corners and 58 facets. This pillow-like shape has a gorgeous symmetry that comes to life when placed in an engagement ring setting.

Elongated Cushion

The Elongated Cushion Cut Diamond is as the name states, an elongated version of a Cushion Cut Diamond.


This unique, boat-shaped brilliant stone uses a similar cutting process to the Round Cut Diamond, maximising the amount of sparkle and carat weight. By elongating the gem into this shape, inclusions can be eliminated whilst preserving the most amount of unblemished stone as possible. It is important to note that this elongated shape may make colour and clarity imperfections more apparent than in a traditional Round Cut Diamond.


A Princess Cut Diamond is a traditional square shape, with 58 facets that can sparkle almost as much as a Round Cut. This gorgeous shape has crisp 90 degree corners that make a statement as an engagement ring centrepiece.


Also known as the “Square Emerald Cut”, an Asscher Cut Diamond features a step-cut and cropped corners. As with the Emerald Cut Diamond, the Asscher shape is fully transparent, allowing you to see right through the stone. Bright and clear in appearance, it is important to select a near-flawless Asscher Cut stone as imperfections will be more pronounced to the naked eye.


Featuring a unique cleft at the top of the stone, the Heart Shaped Diamond displays a romantic, dazzling brilliance. Precise symmetry is the fundamental element of this shape as both sides of the heart must be identical. A Heart Diamond should exhibit a sharp, precise split and the wings should have a rounded edge. It is worth noting that Heart Diamonds will appear much smaller once set in prongs and as a general rule, stones below 0.50 carats are not a good choice. We recommend a Bezel or three prong setting for this unique shape.