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The cushion cut is one of the most loved diamond shapes — soft, romantic, with a heritage stretching back centuries. But here is what most buyers never discover until they are standing at the counter: not all cushion cut diamonds sparkle the same way. Two cushions can share the same shape and the same certificate, yet look like different stones entirely. The reason is faceting — and the choice between “brilliant” and “crushed ice.”
[ IMAGE TO ADD — Featured image | Brilliant cushion cut and crushed ice cushion cut, side by side | ALT: Brilliant cushion cut and crushed ice cushion cut diamonds compared side by side at IDC Cayman ]
A cushion cut diamond is a square or slightly rectangular shape with gently rounded corners and softly curved sides — like a pillow, or a cushion, which is exactly how it earned its name. It is one of the oldest diamond shapes still in production, a direct descendant of the antique “old mine cut” that lit candlelit ballrooms long before electricity.
That history is part of its charm. A cushion cut carries a romantic, vintage warmth that crisp modern shapes do not. It is the shape for someone who wants a diamond with a sense of softness and story. But within that single shape outline, there are two very different faceting styles — and the difference between them is the most important decision you will make.
When a diamond cutter shapes a cushion, they choose how to arrange its internal facets. That choice produces one of two distinct looks: brilliant (sometimes called “chunky”) or crushed ice. Neither is better. They are simply different aesthetics — and knowing which you prefer will save you from a ring you do not love.
A brilliant-faceted cushion has larger, fewer facets arranged in a bold, organised pattern. Look into it and you see defined flashes of light — broad, distinct sparkles, often with a striking star pattern radiating from the centre. The sparkle is dramatic and clearly delineated. People who love brilliant cushions describe them as having “personality” — you can see each flash. This style also tends to read as more vintage and is the look of many antique cushions.
A crushed ice cushion has many more, smaller facets, often arranged with a needle-like internal pattern. Instead of broad defined flashes, the light scatters into countless tiny, glittering pinpoints — exactly like sunlight on a glass of crushed ice. The effect is a soft, romantic, all-over shimmer rather than bold individual sparkles. Crushed ice cushions look beautifully “icy” and contemporary, and the busy faceting has a practical bonus: it hides inclusions and slight colour extremely well, so you can often choose a lower clarity and colour grade without anyone noticing.
Brilliant cushions flash. Crushed ice cushions shimmer. The “right” one is simply the one your eye is drawn to.
Once you know the difference, it is easy to spot. Look straight down into the diamond:
| What you see | Brilliant cushion | Crushed ice cushion |
|---|---|---|
| Sparkle character | Bold, defined flashes | Fine, glittering shimmer |
| Facet pattern | Large, clear, often a star | Many tiny, needle-like facets |
| Overall feel | Vintage, characterful | Modern, soft, “icy” |
| Hides inclusions / colour | Less — be more careful on grades | Very well — grades can be lower |
One firm word of advice: this distinction does not appear clearly on a GIA certificate. You cannot order a cushion by grades alone and know which look you are getting. You have to see the actual diamond — ideally both styles side by side. It is the only way to know which one is yours.
[ IMAGE TO ADD — In-article image | Cushion cut diamond engagement ring on the hand | ALT: Cushion cut diamond engagement ring with a soft, romantic silhouette from IDC Cayman ]
Choose a brilliant cushion if you love clearly visible, dramatic sparkle, are drawn to a vintage or antique feel, and want each flash of light to be distinct. Because it hides less, lean toward a higher clarity (VS) and a near-colourless grade.
Choose a crushed ice cushion if you love a soft, glittering, contemporary shimmer, want a romantic “icy” look, and would like to stretch your budget — its busy faceting forgives lower clarity and colour grades beautifully, letting you spend on size instead.
There is genuinely no wrong answer. This is one of the few diamond decisions that is pure personal taste.
Whichever faceting you prefer, a few things make any cushion cut diamond more beautiful. The length-to-width ratio sets the shape: around 1.00 to 1.05 reads as square, while 1.10 and above reads as a softer rectangle — both are lovely, so pick by eye. The corners should be evenly rounded and symmetrical. As always, prioritise cut quality above all — our guide to the 4 Cs of diamonds explains why cut drives every diamond’s beauty.
The cushion’s soft, romantic shape pairs naturally with several settings. A halo of small diamonds amplifies its glow and makes the centre stone look larger — a favourite for crushed ice cushions especially. A solitaire on a delicate or pavé band lets the cushion’s character speak for itself. And the cushion is the natural heart of a vintage-inspired design, where milgrain detail and filigree echo its antique origins — explore our vintage-inspired engagement rings. The current trend toward chunky, sculptural bands also suits the cushion’s generous, pillowy form perfectly.
The cushion cut is the clearest example of why a diamond should be chosen with your own eyes. Brilliant or crushed ice, square or soft rectangle — these are differences a description can name but only a viewing can settle. At IDC Cayman’s George Town showroom, our GIA-trained gemologists will place both faceting styles in front of you, in natural Caribbean light, so the choice becomes obvious.
Every significant cushion cut diamond we offer is GIA-certified, and the Cayman Islands’ zero-duty, zero-VAT status means certified quality often costs significantly less here than in the US, UK or Europe. Browse our engagement ring collection, or if you are still comparing shapes, read our guide to oval diamond engagement rings.
Compare cushion cut faceting styles side by side with our gemologists in George Town, Grand Cayman. Book a viewing with IDC Cayman ›
A brilliant (or chunky) cushion cut has larger, fewer facets that produce bold, clearly defined flashes of light and a vintage feel. A crushed ice cushion cut has many tiny facets that scatter light into a fine, glittering, all-over shimmer with a modern, icy look. Both are the same shape, faceted differently.
The crushed ice cushion cut hides inclusions and slight colour far better, because its many small facets break up light and disguise imperfections. This means you can often choose a lower clarity and colour grade in a crushed ice cushion without any visible difference, stretching your budget further.
Yes. Cushion cut diamonds are durable thanks to their rounded corners, romantic and timeless in style, and versatile across solitaire, halo and vintage settings. The key is to view the actual stone so you can choose between brilliant and crushed ice faceting, as this is not specified on a certificate.