What is an Elongated Cushion Cut Diamond?
The extended cushion cut diamond is a version of the traditional cushion cut. It is rectangular in shape with softly rounded corners. The extended cushion cut is longer than it is wide, with a length to width ratio of 1.15 or greater, as opposed to the normal cushion cut that is typically square or almost square.
It is called a cushion because the rounded edges and huge open facets give it a pillow-like appearance. These large facets reflect light in a unique, romantic fashion -- producing what gemologists refer to as a “crushed ice” or chunky sparkle effect, depending on the cut of the facets.
Classic Cushion
Ratio: ~1.00–1.09
Elongated Cushion
Ratio: 1.15–1.30+
History of the Elongated Cushion Cut
The cushion cut is one of the oldest diamond shapes in the world, dating back to the 18th century. It was the most important diamond shape for about 200 years, originally called the "old mine cut," and it was valued because it could maximize brilliance in candlelight using the cutting technology of the day.
The old mine cut had a high crown, a tiny table and a huge culet and gave it a deep, romantic glow. As the 19th century progressed and cutting techniques improved the design evolved into what we now recognise as the cushion cut, with more refined proportions and a more consistent girdle.
The long version came into its own more in the 20th century, when cutters began experimenting with rectangular shapes but kept the cushion’s trademark rounded corners and soft facet architecture. It really took off in the 2010s and 2020s when women wanted engagement bands that looked bigger on the finger but without the severe angles.
Timeless Appeal : The elongated cushion is a stunning blending of old romance and current sensibility making it one of the most versatile diamond cutters available today
Why Choose an Elongated Cushion Cut Diamond?
There are a host of compelling reasons why this cut has soared in popularity among engagement ring consumers and fine jewellery aficionados alike.
Appears larger on the finger
The elongated shape covers more finger surface area, making the diamond look bigger than its carat weight suggests.
Unique sparkle character
Large, broad facets create a distinctive romantic glow — less "disco ball," more soft, dreamy shimmer.
Vintage meets modern
It carries the old mine cut's warmth and history while fitting seamlessly into contemporary settings.
Better value per carat
Cushion cuts are often priced lower per carat than rounds, giving you more visual impact for your budget.
Besides the practicality, there’s something fundamentally romantic about this cut. Its fine edges lack the harshness of a princess or emerald cut, yet feel purposely exquisite, never accidental. It’s flattering on a lot of hand shapes and looks amazing with simple solitaires and elaborate halos.
What Setting is Best for Elongated Cushion Cuts?
Choosing the right setting is crucial — it can either enhance the elongated shape or visually shorten it. Here are the top settings that work beautifully with this cut.
Solitaire
A simple four or six-prong solitaire lets the diamond speak for itself. Choose prongs at the corners to emphasise the elongated silhouette.
Halo
A cushion-shaped halo of pavé diamonds amplifies the size and adds brilliance around the centre stone. Avoid round halos — they shorten the visual length.
East–West setting
Turning the diamond horizontally creates a modern, architectural look that's uniquely flattering and increasingly fashionable.
Three-stone
Pairing with tapered baguettes or pear-shaped side stones complements the length and adds meaningful symbolism to the design.
What Are the Downsides of an Elongated Cushion Cut?
As with any diamond shape, there are trade-offs to consider before committing. Being informed about the downsides ensures you make a purchase you will love for a lifetime.
Advantages
- Looks larger than its carat weight
- Romantic, distinctive sparkle
- More affordable than round cuts
- Flatters most finger types
- Versatile across settings
Considerations
- Not as standardised – grade varies considerably
- Stones are harder to compare not seeing them.
- Colour more noticeable in lesser grades
- Bow-tie effect in certain cuts
- Less certified alternatives v round
What you want to look for here is the bow tie effect a black shadow in the middle of the stone that looks like a bow tie. This is when light passes through facets that are not lined up. Always see a diamond in person or on a high definition video before you buy it. This defect will not show up on a grading certificate.
Colour note: Cushion cuts tend to have more body colour than the sparkling rounds. For a frosty white effect, strive for H or above. If you adore the warm glow of older stones, G–J in yellow gold can be quite spectacular.
How to Choose an Elongated Cushion Cut Diamond
Cushion cuts aren’t as standardized as round brilliants, so shopping around for one is a little different. Choosing the right stone.
Target a length/width ratio of 1.20–1.30. Below 1.15 it reads square, over 1.35 it looks a little too narrow and looses the cushion character.
The most important thing is cut quality. Look for good depth percentages (60-68%) and table percentages (58-68%). A good cut can compensate for somewhat inferior colour or clarity.
Always check out a video of the rock. Still photographs do not capture the bow-tie appearance and possibly distort sparkling character. There are several of good internet jewellers that offer 360° films.
Choose colour H or better for white metal settings. Cushions hold colour better than rounds. G–J is absolutely acceptable and frequently preferable in yellow or rose gold.
VS2 or SI1 clarity is usually eye clean. Cushion cuts tend to hide inclusions better than step cuts like emeralds. This is often the place you can save funds without any visual sacrifice.
Ask if they want “crushed” or “chunky ice.” Big cushions feature big, well-defined facets and a traditional luster. Crushed ice features micro-facets that refract light in a frosty, shimmering way. It’s not one better than the other, it’s a matter of personal preference.
Ask for a GIA or AGS certificate. These are the most trusted grading labs for cushion cuts and give you an unbiased review of the quality of the stone.
Final thought : The elongated cushion cut is for those who take the time to look closely. With a round brilliant, cut grade performs most of the work for you, but here, your own eye – seeing light dance through that characteristic pillow shape – is your finest tool.
What is an elongated cushion cut diamond?
An elongated cushion-cut diamond is the rectangle-shaped form of the traditional cushion cut, where all four corners are rounded, and its length-to-width ratio exceeds 1.15. This stone gives an impression of increased size, but it still preserves its typical romantic touch.
Why are elongated cushion cut diamond engagement rings so popular?They seem larger than the carat size, are cheaper compared to round diamonds, and come with a distinctive old-school and modern design. Their rounded design suits any finger, hence making them a preferred diamond ring option.
Does an elongated cushion cut diamond sparkle well?Yes, but in a different way than a round brilliant. This is because of its unique ability to cast a warm and romantic light with big bursts of light instead of the bright mirror-like shine that comes from the round brilliant.
What setting works best for an elongated cushion cut diamond ring?The optimal setting choices would be a solitaire with four prongs or a cushion shape halo. Both emphasize the elongated shape of the diamond. One should avoid round halo settings, as they tend to make diamonds appear shorter.
