Cushion Cut Diamond Engagement Rings
Cushion cut diamond engagement rings combine the soft, rounded corners of a pillow-shaped outline with a depth of light performance that modern brilliant cuts do not replicate. The cushion cut has been in continuous use since the 18th century, making it one of the oldest diamond shapes still popular today. At Si Vis Amari, we design every cushion cut engagement ring around the specific proportions of the individual diamond, because cushion cuts vary more in character than almost any other shape. Every ring is made in our UK workshop and hallmarked by the Birmingham Assay Office.
Whether you are drawn to the candlelight warmth of a classic cushion brilliant, the icy sparkle of a modified brilliant, or the elongated drama of a stretched cushion, this page covers everything you need to know before choosing your stone.
Cushion Brilliant vs Cushion Modified Brilliant
Not all cushion cut diamonds sparkle the same way. The two main categories, cushion brilliant and cushion modified brilliant, produce fundamentally different light patterns, and understanding the difference is one of the most important steps in choosing the right stone.
Cushion brilliant cut diamonds follow a faceting pattern similar to a traditional round brilliant, adapted to fit the cushion outline. The result is broad, chunky facets that produce a candlelight scintillation, with large flashes of light and colour that roll across the stone as it moves. Classic cushion brilliants often exhibit a visible culet at the base of the diamond, which was standard practice in older cutting styles and contributes to the vintage character of the shape. This candlelight quality gives a cushion brilliant a warmth and depth that modern cuts, with their sharper, more fragmented sparkle, cannot replicate. If you are drawn to the aesthetic of vintage engagement rings, a cushion brilliant is one of the most authentic diamond choices available.
Cushion modified brilliant cut diamonds use an adapted faceting arrangement beneath the crown, typically with an extra row of facets on the pavilion. This breaks the light into smaller, more numerous reflections, creating what is often described as a crushed ice appearance. The sparkle is busier, brighter, and more fragmented than a classic cushion brilliant. Modified brilliants are closer in visual character to a radiant cut than to a traditional cushion. Some modified brilliant cushions still produce broad flashes similar to a classic cushion, while others lean heavily into the crushed ice look. The variation within this category is significant, which is why we always recommend viewing the specific stone rather than relying on certificate specifications alone.
On a GIA or IGI certificate, you will see the diamond described as either “Cushion Brilliant” or “Cushion Modified Brilliant.” This single line tells you more about how the diamond will look in person than almost any other detail on the report. We will always talk you through this distinction during your consultation and help you choose the right variant for the look you want.
Understanding Cushion Cut Shape
Cushion cut diamonds come in a wider range of proportions than most people realise. Two cushion cuts with identical length-to-width ratios can look completely different in shape, and this is one of the most misunderstood aspects of buying a cushion diamond.
Square cushion cuts have a length-to-width ratio close to 1.00. They sit compactly on the finger with equal proportions in both directions. A square cushion has a balanced, centred presence that works well in halo and solitaire settings.
Elongated cushion cuts have a ratio of approximately 1.15 to 1.30 or beyond, stretching the shape into a rectangle with rounded corners. An elongated cushion cut engagement ring covers more of the finger and creates a slimming, elegant effect similar to an oval but with a softer, more romantic outline. Elongated cushion cut diamonds are one of the fastest-growing choices in engagement ring design.
Beyond the ratio: boxy vs soft. Here is where most guides stop, but the ratio alone does not tell the full story. Two cushion cuts can share the same 1.10 ratio but look quite different depending on how the sides deviate towards the head (the top and bottom edges). A cushion where the sides remain relatively straight before curving sharply at the corners will appear more boxy and structured. A cushion where the sides bow gently outward across their full length will appear softer and more pillowy. This distinction does not appear on any certificate. It is something you see only when you look at the diamond itself, and it is one of the details we assess when sourcing cushion cuts for our customers.
The Culet
Many classic cushion brilliant diamonds feature a visible culet, a small flat facet at the very bottom point of the diamond. In modern round brilliant cuts, the culet is usually pointed (closed) or very small, making it invisible. In older cushion cuts and many contemporary cushion brilliants, the culet can range from small to medium or even large.
A visible culet is not a flaw. It is a characteristic of the cut style and contributes to the vintage, candlelight quality that makes cushion brilliants distinctive. When you look into the diamond from above, a larger culet creates a small visible circle at the centre, which some customers love for its period authenticity and others prefer to avoid. We will always show you the culet and explain how it affects the appearance of the specific stone you are considering.
How to Choose a Cushion Cut Diamond
Choosing a cushion cut diamond requires more attention to the individual stone than most other shapes. Here is what to consider:
Brilliant or modified brilliant. Decide whether you want the broad, warm candlelight of a classic cushion brilliant or the busier, icy sparkle of a modified brilliant. This is the single most important decision and it is personal preference, not quality.
Square or elongated. Consider which proportions suit your hand and your setting choice. Elongated cushion cuts create more finger coverage, while square cushions have a more compact, centred look.
Side profile and shape character. Look at the actual diamond, not just the ratio. Assess whether the outline is boxy or soft, and decide which character appeals to you.
Culet. Check whether the diamond has a visible culet and decide if the vintage character it adds is something you want or prefer to avoid.
Colour. Cushion cuts, particularly elongated cushions, can concentrate colour in the corners. If you are choosing a lab-grown diamond, we typically recommend D to E colour for cushion cuts to ensure the stone faces white from every angle. For natural diamonds, F to G colour offers excellent value while still appearing colourless in most settings.
Certification. Every cushion cut diamond we supply is independently certified by the IGI or GIA, with full grading for carat weight, colour, clarity, and cut quality. The certificate will confirm whether the stone is cushion brilliant or cushion modified brilliant.
Cushion Cut Engagement Ring Styles
The cushion cut’s soft, rounded outline makes it one of the most versatile shapes for engagement ring design. It pairs naturally with a wide range of setting styles.
Cushion cut solitaire engagement rings let the diamond’s shape and light performance speak for themselves. A solitaire setting with clean lines and a minimal band draws all attention to the cushion’s distinctive outline. This is where the difference between a boxy and a soft cushion becomes most visible.
Cushion cut halo engagement rings surround the diamond with a border of smaller stones, amplifying the already generous proportions of the cushion shape. A halo that follows the cushion’s rounded corners creates a seamless frame that makes the centre stone appear significantly larger.
Hidden halo cushion cut engagement rings place the additional diamonds beneath the stone, keeping the top profile clean while adding sparkle from the side. The hidden halo is a popular choice for cushion cuts because it maintains the shape’s soft outline without adding visual width.
Cushion cut vintage engagement rings are a natural combination. The cushion shape has been in use since before the modern brilliant cut existed, and its candlelight quality fits seamlessly into Art Deco, Victorian, and Edwardian inspired designs. Pair a cushion brilliant with millgrain, hand engraving, and an open gallery for the most authentic period feel.
We also craft cushion cut rings in shoulder set, trilogy, and bespoke designs. Whatever setting style you are drawn to, get in touch and we will design it around your cushion diamond.
Old Mine Cut Diamonds
The cushion cut’s ancestor is the old mine cut, the dominant diamond shape from the 18th century through to the early 1900s. Old mine cut diamonds were cut entirely by hand, producing higher crowns, smaller tables, larger culets, and chunkier facets than any modern cushion. The result is a softer, warmer light performance with broad flashes of colour that contemporary cutting cannot reproduce.
If you want the most historically authentic cushion engagement ring, an old mine cut diamond set in a vintage inspired mount is the closest you can get to an original period piece while still having a ring made new. We source old mine cut diamonds individually and they pair beautifully with our vintage collection.
Metals
Every cushion cut engagement ring in our collection is available in four metals: platinum, 18ct yellow gold, 18ct white gold, and 18ct rose gold. Rose gold cushion cut engagement rings are a particularly popular combination, as the warmth of rose gold complements the soft, romantic outline of the cushion shape.
Our 18ct white gold uses a high palladium content alloy that maintains a natural silver-white appearance without rhodium plating. Platinum is the most durable option and will not change colour over time. Yellow gold creates a warm, vintage feel that pairs naturally with cushion brilliant diamonds.
All our metals are sourced responsibly and every ring is hallmarked by the Birmingham Assay Office in accordance with UK law.
Lab-Grown and Natural Cushion Cut Diamonds
Our cushion cut engagement rings are available with both lab-grown and natural diamonds. A lab-grown cushion cut diamond is chemically, optically, and physically identical to a mined diamond, certified independently by the IGI or GIA. Lab-grown diamonds typically cost 60 to 80% less than natural equivalents at the same specification.
This makes larger sizes significantly more accessible. A 2 carat cushion cut diamond ring or 3 carat cushion cut diamond ring in lab-grown is achievable at a fraction of what the natural equivalent would cost. Whether you choose a lab-grown elongated cushion cut diamond or a natural cushion brilliant, the quality of the stone and the craftsmanship of the ring are identical.
For natural cushion cut diamonds, we source stones individually to match your exact requirements. Get in touch for a no-obligation quote.
Wedding Ring Compatibility
The cushion cut’s rounded corners generally make it easier to pair with a straight wedding band than some angular shapes. Every Si Vis Amari cushion cut ring is designed with wedding ring compatibility considered from the outset, so a straight band sits flush without any gap. If you prefer a shaped or contoured wedding ring, we can design one to match.
Browse our full engagement ring collection or book a consultation at our Didsbury or Manchester city centre studio.
Frequently Asked Questions
What is the difference between cushion brilliant and cushion modified brilliant?
A cushion brilliant follows a faceting pattern similar to a round brilliant, producing broad, warm flashes of light often described as candlelight scintillation. A cushion modified brilliant has extra facets on the pavilion that break light into smaller, more numerous reflections, creating a crushed ice or icy sparkle. The distinction is noted on the GIA or IGI certificate. Neither is better, it is personal preference.
What is an elongated cushion cut?
An elongated cushion cut is a cushion diamond with a length-to-width ratio greater than approximately 1.15, stretching the shape into a rectangle with rounded corners. Elongated cushion cut engagement rings cover more of the finger and create a slimming effect similar to an oval. They are one of the fastest-growing diamond choices for engagement rings.
What is a culet and should I avoid one?
A culet is a small flat facet at the very bottom of the diamond. Many cushion brilliant diamonds have a visible culet, ranging from small to large. It is not a flaw. It is a characteristic of the cut style that contributes to the vintage, candlelight quality of the stone. Some customers love the period authenticity a culet adds, others prefer a closed point. It is a matter of personal taste.
Does the length-to-width ratio tell me everything about the shape?
No. Two cushion cuts with the same ratio can look quite different depending on how the sides curve. A cushion with straighter sides appears more boxy and structured. One with gently bowed sides appears softer and more pillowy. This is not recorded on any certificate and can only be assessed by looking at the diamond itself. We evaluate this for every cushion cut we source.
How much does a cushion cut engagement ring cost?
Pricing depends on the carat weight, diamond quality (lab-grown or natural), and choice of setting and metal. Use the configurator on any product page for live pricing, or contact us for a detailed quote. Lab-grown cushion cut diamonds cost 60 to 80% less than natural equivalents at the same specification.
Which setting suits a cushion cut best?
The cushion cut works beautifully in virtually every setting. Solitaire settings showcase the shape cleanly. Halo settings amplify the diamond’s visual size. Hidden halos add sparkle without widening the profile. Vintage settings with millgrain and engraving complement the cushion’s period heritage. It is one of the most versatile diamond shapes for engagement ring design.
Are cushion cut diamonds good for everyday wear?
Yes. The cushion cut’s rounded corners make it less prone to chipping than shapes with sharp points like marquise or princess cuts. Combined with a well-engineered setting, a cushion cut engagement ring is built for a lifetime of daily wear. Every ring we make is designed with durability as a priority.
Can I see the diamond before committing?
Yes. We always recommend viewing the specific cushion cut diamond before making a decision, particularly because cushion cuts vary so much in their light pattern, shape character, and culet size. Book a consultation at our Didsbury or Manchester city centre studio and we will walk you through the options in person.