Cushion-cut lab-grown diamonds: the short answer
Cushion cuts combine softened corners with a square or elongated outline. They can show broad, distinct flashes, a finer “crushed-ice” pattern, or something between the two. That variety is the appeal—and the reason you should compare actual videos before narrowing the search by grades.
Start by choosing the outline and facet pattern you prefer. Then compare face-up dimensions, brightness, color and inclusions. For many shoppers, F–H color and VS1–VS2 clarity are sensible starting points, but the individual diamond matters more than automatically buying a higher paper grade.
We compare cushion cuts using videos, grading reports, face-up measurements and current prices together. Our experience buying, returning and inspecting lab-grown diamond jewelry has shown why that matters: cushions with similar grades can have very different outlines, reflection patterns and visible size.
A cushion-cut diamond to compare
This 1.04-carat E-color, VVS2 cushion cut was listed at $317 when we checked Ritani on September 11, 2026. It had an IGI report and Ritani's Very Good cut label. Compare its outline, facet pattern, dimensions and video with other cushions near one carat.
See cushion-cut diamonds at Ritani
What is a cushion cut?
A cushion is a four-sided diamond with rounded corners. Some are almost square; others are noticeably rectangular. The shape developed from older “pillow” cuts, but modern cushions use several different brilliant-style facet arrangements.
The cushion traces its character to the old mine cut, whose high crown, small table and rounded outline were designed for candlelight. Modern cutting has changed the proportions and brightness, but the softened square still ranges from antique-looking to distinctly contemporary. This variety is why two grading reports with similar numbers can describe very different-looking cushions.
Length divided by width describes the outline. A ratio near 1.00 looks square, while roughly 1.10 and above begins to look elongated. There is no universally best ratio. Choose the silhouette that suits the setting and the wearer’s hand.
Cushion brilliant versus modified cushion
The grading report may describe a cushion brilliant or cushion modified brilliant, but that wording alone does not tell you exactly how it will look. Modern cushions are often discussed as “chunky” or “crushed ice”—useful visual descriptions, not official quality grades.
A chunky cushion shows larger, more defined flashes. A crushed-ice cushion breaks light into many smaller reflections, especially toward the ends or corners.
Neither pattern is automatically better. Look for a lively center, balanced reflections and an appearance you enjoy in motion. Avoid a stone that looks persistently gray, watery or dull across a large area.
Cushion-cut pros and cons
What we like
- Soft corners and a versatile outline
- Square and elongated options
- Several distinct facet patterns to choose from
- Can cost less than a comparable round brilliant
- Works well in solitaire, halo and vintage-inspired settings
What to consider
- Cushions can face up small when much of the weight sits in the depth
- Cut labels and proportions do not capture every facet pattern
- Some stones show color more readily than rounds
- “Crushed ice” can range from lively to cloudy-looking
How to choose a cushion-cut lab diamond
Choose the outline and pattern first
Do not begin with a carat target and accept whichever cushion appears. Compare square and elongated outlines, then compare broad and fine reflection patterns. Once you know the look you prefer, the grades become easier to use.
Look at the corners and shoulders as well as the ratio. Some cushions are softly rounded, while others are almost square with only slight corner rounding. Elongated cushions can show more contrast at the ends. Neither outline is inherently better, but it should appear balanced and intentional.
Judge cut from the diamond, not one ratio
Depth and table percentages are screening tools. We would usually start around the broad 60–70% range for each, then inspect the video and measurements. A cushion can fall inside a popular range and still look weak, or sit just outside it and look excellent.
Some laboratories provide a fancy-shape cut assessment, while seller filters may apply their own labels. Open the grading report and do not assume every “Ideal” badge means the same thing.
Compare clarity and color face-up
VS1–VS2 is a useful clarity range for many cushions. Inspect the location and type of inclusion rather than paying for a grade you cannot see. Larger stones and broad-facet patterns may reveal inclusions more easily.
F–H is a practical color starting point for a near-colorless look. Cushions can hold warmth in their corners, so compare the actual video and intended metal. Yellow or rose gold can make a warmer grade work beautifully.
Check size in millimeters
Carat measures weight, not visible area. Compare length and width and watch for excessive depth. An elongated cushion may look larger along the finger, while a deep square cushion can look compact for its weight.
Compare stones immediately below popular thresholds such as 1.00, 1.50 and 2.00 carats. A 0.95-carat cushion with good spread may look as large as a deeper one-carat stone. Do not choose shallow proportions for size alone; brightness and an orderly facet pattern still matter.
Cushion-cut engagement-ring settings
A four-prong solitaire keeps the outline visible. Halos amplify the pillow shape, while a hidden halo adds detail without surrounding the center face-up. Elongated cushions work well in north–south solitaires and three-stone rings. Make sure the prongs sit symmetrically and do not make the corners look uneven.
Bezel settings protect the entire edge and give a modern frame, while double-claw prongs suit antique-inspired designs. For a three-stone ring, tapered baguettes create contrast and smaller cushions continue the softened geometry. Check setting height, band width and whether a wedding band will sit flush.
Cushion-cut jewelry to compare
These studs show the cushion's softened square outline in finished jewelry. Compare total diamond weight and face-up dimensions when judging value.
Ritani · Earrings
Cushion-cut lab-grown diamond stud earrings
- Cushion-cut lab-grown diamonds
- Four-prong stud settings
- Push backs
The softened square outline is easier to see here than in a small loose-diamond thumbnail. Compare total diamond weight, metal and backing style before ordering.
Price checked September 10, 2026.
See at RitaniHow much does a cushion-cut lab diamond cost?
In our September 2026 Ritani comparison, a typical price among the five lowest qualifying one-carat cushion cuts was $279, compared with $240 for round diamonds. Every diamond was 0.95–1.05 carats, E color, VVS2 clarity and IGI graded. The result is a reminder that cushions do not always cost less, especially when the available outlines and facet patterns differ.
Prices also depend on visible size, grading report, facet pattern and seller. Compare several stones with similar dimensions and grades, then decide whether a lower-priced option has the pattern you want.
To save, start with an eye-clean VS2 and compare G–H color in the intended metal before moving to higher grades. Lab-grown inventory makes high specifications affordable, but paying more for VVS clarity does not improve a cushion whose center looks dull. Compare the complete ring price because setting promotions may exclude the loose diamond.
Our one-carat price guide includes a matched fancy-shape comparison. For a broader view of the tradeoffs, see our lab-grown diamond shapes guide.
Where to buy cushion-cut lab-grown diamonds
Look for a seller that shows the actual diamond in motion and provides its grading report. Then compare the complete ring price, setting choice, service and return terms.
| Jeweler | Best for | Rating | Shop cushion cuts |
|---|---|---|---|
| Ritani | Loose-diamond prices, selection and value | 4.7/5 | See cushion-cut diamonds at Ritani |
| Brilliant Earth | Ring settings and showroom support | 4.5/5 | See cushion-cut diamonds at Brilliant Earth |
| With Clarity | Complete rings and straightforward customization | 4.5/5 | See cushion-cut diamonds at With Clarity |
| Grown Brilliance | Ready-designed engagement rings | 4.5/5 | See cushion-cut diamonds at Grown Brilliance |
Choose a retailer that provides the exact diamond's video and grading report. Cushion terminology is inconsistent, so a large catalog and useful imagery matter more than a seller offering one “ideal” filter. Save report numbers when comparing virtual inventory and include resizing, returns and production time in the decision.
Cushion-cut FAQ
Is cushion cut a good choice for an engagement ring?
Yes. Its rounded corners are wearable, and the range of outlines and facet patterns makes it easy to find a distinctive look.
Is crushed ice bad?
No. It is a visual preference. Choose a lively crushed-ice pattern and avoid large areas that remain dull or gray as the stone moves.
What length-to-width ratio is best?
There is no single best ratio. Near 1.00 looks square; higher ratios look increasingly elongated. Choose the outline before optimizing the other specifications.
Does a cushion cut look larger than a round?
It depends on its depth and outline. Elongated cushions can provide generous finger coverage, while deep square cushions may look compact. Compare millimeter measurements rather than carat weight alone.
What clarity is best for a cushion cut?
VS1–VS2 is a useful starting range, and an eye-clean SI1 can offer good value. Judge inclusion position, transparency and the face-up video before paying for VVS clarity.
Questions and experiences
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