The cushion cut is the diamond of nostalgia. Its softly rounded corners and pillowy silhouette read as vintage even when the ring is brand new — a shape that has been quietly appearing on engagement fingers since the 18th century, when it was called the "mine cut." Today, cushion cuts have surged back into the mainstream, powered by celebrity engagement rings (Kim Kardashian, Priyanka Chopra, Sofia Vergara), the rise of lab grown diamonds, and a millennial and Gen Z bridal market that gravitates toward soft, romantic silhouettes over sharp geometric ones. This guide covers everything you need to know about cushion cut lab grown diamond engagement rings — the two subtypes, the 4Cs strategy, the best settings, and honest pricing at every carat.
Last updated: July 2026 by the Mohana Jewels editorial team.
The two cushion cut subtypes
Before you shop, understand that "cushion cut" is actually two different faceting patterns that look substantially different on the finger.
Cushion brilliant — a modern cushion with 58 or 64 facets designed to maximize fire and scintillation, similar to a round brilliant. This is the more popular subtype today. Reads as sparkly, contemporary, and youthful.
Cushion modified brilliant (or "crushed ice") — a cushion with additional pavilion facets creating a fragmented, mosaic-like sparkle pattern that reads as vintage. Named "crushed ice" because the fractured light play resembles a glass of chipped ice under sun.
Both are gorgeous. Cushion brilliant is what you want if you love the fire and clarity of a round; cushion modified brilliant is what you want if you love the antique, romantic patina of an heirloom stone. Every cushion cut diamond in our inventory is clearly labeled by subtype, and you should specify which you prefer before you commit.
The 4Cs for cushion cut lab grown diamonds
Cushion cuts sit between brilliant cuts (round, oval, pear) and step cuts (emerald, asscher) in how forgiving they are of inclusions and color. Every stone in our inventory carries an IGI or GIA laboratory-grown diamond report.
| 4C | Recommended range for cushion cut | Why it matters |
|---|---|---|
| Cut | Excellent to Very Good; brilliant or crushed ice by preference | GIA doesn't grade cushion cut overall — you must review each stone. |
| Color | F to H for white metals; H to J for yellow gold | Cushion cuts can show color at corners; go one grade higher than round. |
| Clarity | VS1 to VS2; eye-clean SI1 acceptable for brilliant subtype | Brilliant faceting hides inclusions; crushed ice hides them even better. |
| Carat | 1.50 to 2.50 for typical bridal budgets | Cushions face up 5-8% smaller than rounds because of their deeper pavilion. |
| Ratio | 1.00 to 1.10 (square); 1.15-1.30 (elongated) | Square cushion reads as vintage; elongated cushion as modern. |
Square versus elongated cushion
Cushion cuts come in two aspect ratios that read as completely different aesthetics.
Square cushion (1.00-1.10 ratio) — the classic vintage look. Reads as heritage, romantic, and warmly nostalgic. If you love antique estate jewelry or want an heirloom feeling, this is the ratio for you. Kim Kardashian's original 15-carat cushion cut engagement ring was a square cushion.
Elongated cushion (1.15-1.30 ratio) — the modern reinterpretation. Reads as elegant, contemporary, and slightly art deco. Elongates the finger while retaining the softness of the cushion silhouette. Priyanka Chopra's cushion cut ring is a classic elongated cushion.
Neither is "better" — the choice comes down to taste and hand shape. Short or narrow fingers benefit from elongated ratios; long fingers can carry either.
The best settings for a cushion cut
Solitaire
A four-prong solitaire is the classic cushion cut setting. Because the corners are rounded rather than sharp, cushion cuts don't need protective double-prongs the way emerald cuts do. A thin knife-edge band keeps attention on the stone.
Halo
A visible halo is arguably the most popular cushion cut setting — the pillowy silhouette of the cushion pairs beautifully with a ring of melee diamonds around it. A 1.5 carat cushion with halo can read like a 2.5 carat solitaire. This is the setting Kim Kardashian's original ring wore, and it's the most requested cushion setting we quote.
Hidden halo
The modern alternative to a visible halo — a ring of accent diamonds tucked into the underside of the basket. Gives sparkle from the side profile without disrupting the top-down cushion silhouette. Learn more in our hidden halo engagement rings guide.
Three stone with round or pear sides
A cushion center flanked by two smaller round brilliants or pear side stones creates a soft, romantic three stone composition. Our full three stone guide covers the side-stone pairing math.
Bezel
A modern low-profile bezel around a cushion cut reads as contemporary and understated. Because the cushion has rounded corners, the bezel wraps beautifully without the tension of an angular stone.
Vintage-inspired filigree
Because cushion cuts read vintage naturally, they pair beautifully with settings that lean into that aesthetic — milgrain edges, filigree galleries, and rose-gold or yellow-gold construction. If your taste is estate-jewelry-inspired, a filigree cushion setting is the most authentic move.
Metal choice for cushion cut engagement rings
Platinum — the most durable and neutral option. Its cool white tone lets F-G color diamonds show pure white. About 40% more than 18k white gold.
18k white gold — rhodium-plated for a crisp white finish, re-plate every 18-24 months. Cost-effective and the most popular choice.
18k yellow gold — cushion cuts and yellow gold are one of the most beautiful jewelry pairings. The warm gold pulls out the antique romance of the cushion silhouette. Our companion piece on which metal to choose for a lab grown diamond engagement ring compares the trade-offs.
18k rose gold — arguably the most romantic pairing. Rose gold with a cushion cut in a filigree or halo setting is a defining engagement ring aesthetic of the 2020s.
Pricing cushion cut lab grown diamond engagement rings
Lab grown cushion cuts cost 60 to 80 percent less than mined stones of comparable specs. Here's what our clients typically spend, ring-complete.
| Carat weight | Solitaire (18k) | Halo (18k) | Three stone (18k) |
|---|---|---|---|
| 1.00 ct | $1,600-$2,500 | $2,000-$3,000 | $2,500-$3,700 |
| 1.50 ct | $2,400-$3,500 | $2,900-$4,200 | $3,500-$5,100 |
| 2.00 ct | $3,300-$4,900 | $4,000-$5,800 | $4,900-$7,000 |
| 2.50 ct | $4,300-$6,200 | $5,200-$7,500 | $6,300-$8,900 |
| 3.00 ct | $5,500-$8,000 | $6,600-$9,500 | $8,000-$11,200 |
Ranges assume F to G color, VS1 to VS2 clarity, Excellent cut, 18k gold construction. Platinum settings add 15-25%. Custom work with our atelier adds four to six weeks of lead time.
Sourcing and certification
Every cushion cut lab grown diamond we source is grown in an IGI-accredited facility via CVD or HPHT methods and comes with a full laboratory-grown diamond report. Because cushion cuts are graded less rigorously than rounds, we hand-review video footage of every stone before selection to confirm sparkle pattern and light performance. Every stone is 100 percent conflict-free by definition.
Wedding bands that pair with a cushion
Cushion cut engagement rings pair beautifully with soft, curved wedding bands — either plain, pave, or gently contoured. Because the cushion has rounded corners, straight bands sit flush against most cushion solitaires without contouring. For halo cushions, a contoured band that traces the halo silhouette layers most naturally. Yellow-gold pairings work exceptionally well — see our take on yellow gold lab grown diamond wedding bands.
Care and long-term durability
Cushion cuts are highly durable — the rounded corners take less impact stress than pointed shapes like pear or oval. Have a jeweler inspect prongs every 12 to 18 months. Clean weekly with warm water, dish soap, and a soft toothbrush. Our complete guide to diamond jewelry cleaning covers the routine.
The bottom line
A cushion cut lab grown diamond engagement ring gives you the romantic, vintage-leaning silhouette of an heirloom stone at a modern price point. Decide first between cushion brilliant (fire) and cushion modified brilliant (crushed ice romance), then choose square (1.00-1.10) or elongated (1.15-1.30) ratio based on your hand and taste. Whether you go halo, solitaire, or three stone, a cushion cut reads as timeless and warm. Browse our full cushion diamond ring collection or reach out to our atelier for a virtual consultation.
Frequently asked questions
What's the difference between cushion brilliant and cushion modified brilliant?
Cushion brilliant has 58 or 64 facets designed for maximum fire — reads sparkly and modern. Cushion modified brilliant (crushed ice) has additional pavilion facets creating a fragmented, mosaic sparkle pattern — reads vintage and romantic. Both are beautiful; the choice depends on aesthetic preference.
What length-to-width ratio is best for a cushion cut?
1.00 to 1.10 for a classic square vintage look; 1.15 to 1.30 for a modern elongated cushion. Both are gorgeous — it comes down to whether you want heritage or contemporary character on your finger.
Do cushion cuts sparkle less than round brilliants?
Cushion brilliant sparkles nearly as much as a round. Cushion modified brilliant has a fragmented "crushed ice" sparkle pattern that's less sparkly per facet but more romantic. Rounds still have the highest total sparkle by measurement.
Does a cushion cut look bigger than a round of the same carat weight?
Slightly smaller — cushion cuts have a deeper pavilion so more weight sits below the girdle. A 2.00 carat cushion faces up roughly 5 to 8 percent smaller than a 2.00 carat round. Halo settings compensate elegantly.
What certifications should a lab grown cushion cut have?
Look for an IGI or GIA laboratory-grown diamond report. Both grade lab grown stones on the same 4Cs scale as mined diamonds. Every cushion in our inventory carries one of these two certifications.
How long does a custom cushion cut engagement ring take?
Custom orders take four to six weeks from design approval to delivery. We render your ring in CAD, get your approval, then cast and set. Custom pieces are final sale.
What is Mohana Jewels' return policy on cushion cut rings?
In-stock, unworn cushion cut engagement rings can be returned within 14 days of delivery. A 10 percent restocking fee applies; refunds process in 5-7 business days. Order cancellations within 48 hours are free. Shipping is 100 percent insured in both directions. See our returns page.