Last updated: April 2026
The cushion cut diamond — sometimes called a pillow cut — occupies a unique space in the jewelry world. It is neither as traditional as the round brilliant nor as modern as the princess. Instead, it bridges vintage charm and contemporary brilliance, producing broad, romantic flashes of light that feel warm, personal, and deeply appealing. If the round brilliant is a spotlight, the cushion cut is candlelight.
This guide covers everything you need to choose a cushion cut engagement ring with confidence. At Bijolina, we believe understanding the stone is the first step to finding the one that moves you.
What Makes a Cushion Cut Unique
The cushion cut evolved from the old mine cut — the dominant diamond shape before the round brilliant was perfected in 1919. Old mine cuts had large facets, high crowns, and small tables, producing dramatic fire (rainbow flashes) rather than the intense white-light brilliance of modern rounds. The cushion cut retains this romantic optical character while incorporating modern cutting technology for better light return.
Key visual traits: rounded corners (square or rectangular), larger facets than rounds, more fire (colored light dispersion), and a soft, pillow-like silhouette that earned the name.
Brilliant vs Modified Brilliant vs Crushed Ice
Not all cushion cuts look the same. The three sub-types produce dramatically different visual effects:
Brilliant Cushion (Chunky)
Large, distinct facets that produce bold, broad flashes of light and color. Each facet is visible as a separate light-return zone. This is the closest to the traditional old mine cut aesthetic — romantic, vintage, and dramatic. Most popular among buyers who want character and warmth.
Modified Brilliant Cushion (Crushed Ice)
An extra row of facets below the girdle creates a fragmented, sparkling appearance similar to crushed ice or broken glass. The light return is more uniform but less dramatic. Popular among buyers who want maximum sparkle similar to a round brilliant. Important: "crushed ice" is not a GIA term — you must evaluate this visually, not from a certificate.
Hybrid
Some cushion cuts fall between chunky and crushed ice, showing elements of both. There is no standardized grading for this distinction, which is why viewing the actual diamond (photos, video, or in person) matters more for cushion cuts than almost any other shape.
Ideal Proportions
Square Cushion (L:W 1.00–1.10)
The classic cushion proportion. Looks like a pillow from above. Most versatile in settings and most popular for engagement rings. If you want a cushion that reads as "cushion," this is the ratio to target.
Elongated Cushion (L:W 1.15–1.30)
A rectangular pillow shape that creates a finger-lengthening effect similar to oval. Growing in popularity because it combines the romantic cushion aesthetic with the flattering elongation of fancy shapes. Also typically faces up larger than square cushions of the same carat weight.
Other proportions to check: Depth 60–68%, table 58–68%. Cushion cuts vary more than rounds in their proportions, so these are guidelines, not rules. Always evaluate the actual light performance visually. Learn more about cut quality evaluation.
Clarity for Cushion Cuts
Cushion cuts fall in the middle for clarity visibility — better at hiding inclusions than step cuts (emerald, Asscher) but less effective than rounds. The larger facets in brilliant cushions can act as partial windows into the stone.
Recommended minimums:
- Brilliant/chunky cushion: VS2 is reliably eye-clean. SI1 requires individual evaluation.
- Crushed ice cushion: SI1 is usually eye-clean due to the fragmented facet pattern.
- Step cuts are different — see our complete clarity guide.
Color in Cushion Cuts
Cushion cuts tend to retain more body color than round brilliants. This means a G-color round and a G-color cushion may look different — the cushion may show a warmer tint. For white metal settings (white gold, platinum), we recommend G–H color. For yellow or rose gold, I–J works beautifully because the warm metal masks any body color.
The Fire Advantage
This is the cushion cut's superpower. Its larger facets split light into spectral colors more dramatically than rounds. In candlelight, sunset, or warm indoor lighting, a cushion cut diamond throws more rainbow flashes than any other brilliant-cut shape. Buyers who prioritize fire over brilliance consistently choose cushion. Learn how this fits into the overall 4Cs ranking.
Best Settings for Cushion Cuts
- Halo: The most popular cushion cut setting. A ring of small diamonds surrounding the cushion adds visual size, frames the soft shape, and creates a stunning sparkle-contrast. The cushion's rounded corners make it a perfect fit for halos.
- Solitaire: Lets the cushion's fire and character speak for itself. Four-prong shows more diamond; cathedral adds elegance.
- Three-stone: A cushion center with tapered baguette or trapezoid side stones creates an art deco feel.
- Pave band: Small diamonds along the band complement the cushion's sparkle without competing.
For all setting options, see our complete settings guide.
Cushion Cut vs Other Shapes
| Factor | Cushion | Round | Oval |
|---|---|---|---|
| Brilliance | Good | Maximum | Very good |
| Fire | Maximum | Good | Good |
| Face-up size | Similar to round | Baseline | 10% larger |
| Price vs round | 25–35% less | Baseline | 20–30% less |
| Hides inclusions | Moderate | Best | Good |
| Color retention | Shows more color | Moderate | Shows more color |
| Personality | Romantic, vintage | Classic, timeless | Modern, elongating |
For the princess cut comparison specifically, see our princess vs cushion guide.
Lab-Grown Cushion Cut Pricing
Lab-grown cushion cut diamonds cost 60–80% less than mined equivalents with identical physical properties. Price examples for a VS1, G-color cushion:
| Carat | Mined | Lab-Grown | Savings |
|---|---|---|---|
| 1.00ct | $4,000–$6,000 | $800–$1,500 | ~75% |
| 1.50ct | $7,000–$12,000 | $1,200–$2,500 | ~78% |
| 2.00ct | $12,000–$22,000 | $2,000–$4,000 | ~80% |
See our complete lab-grown comparison.
Carat Weight and Face-Up Size
| Carat | Square (mm) | Elongated (mm) |
|---|---|---|
| 0.50ct | 4.5 × 4.5 | 5.0 × 4.2 |
| 0.75ct | 5.2 × 5.2 | 5.8 × 4.8 |
| 1.00ct | 5.8 × 5.8 | 6.5 × 5.3 |
| 1.50ct | 6.8 × 6.8 | 7.5 × 6.2 |
| 2.00ct | 7.5 × 7.5 | 8.2 × 6.8 |
| 3.00ct | 8.5 × 8.5 | 9.5 × 7.8 |
Common Mistakes When Buying Cushion Cuts
- Not knowing which sub-type you want. Chunky vs crushed ice look completely different. Decide before shopping.
- Relying only on the certificate. Cushion cut quality is more visual than quantifiable. Always view photos or video.
- Ignoring color. Cushion cuts retain color more than rounds. Go one grade higher than you would for round.
- Buying too deep. Cushion cuts with depth over 70% carry weight in the belly, not the face. The diamond weighs more but looks smaller.
- Expecting round-like sparkle. Cushion cuts sparkle differently — broader, warmer flashes. If you want pin-point scintillation, choose round.
Frequently Asked Questions
1. Are cushion cut diamonds cheaper than round?
Yes, typically 25–35% less per carat for equivalent quality. This makes cushion cuts excellent value for buyers who appreciate their romantic aesthetic.
2. Do cushion cuts look bigger than rounds?
Similar face-up area at the same carat weight. Elongated cushions (1.15+ L:W) can appear slightly larger due to the stretched shape. The halo setting adds the most perceived size to any cushion.
3. What is the difference between cushion brilliant and cushion modified brilliant?
Cushion brilliant has broader, chunkier light patterns. Cushion modified brilliant (crushed ice) has an extra row of facets creating a more fragmented, uniform sparkle. Both are beautiful — the choice is personal preference.
4. What clarity should I choose for a cushion cut?
VS2 for brilliant/chunky cushions. SI1 is often eye-clean for crushed ice. Always verify with photos since cushion cuts vary more than rounds in how they display inclusions.
5. Is cushion cut good for an engagement ring?
Excellent. Cushion cuts have no vulnerable points (unlike princess or marquise), produce romantic fire, and sit beautifully in every setting type. They are one of the most popular engagement ring shapes.
6. What metal looks best with cushion cut?
Any metal works. White gold enhances the diamond's whiteness. Yellow gold embraces the warm fire. Rose gold creates a romantic, vintage feel that is particularly beautiful with cushion cuts.
7. Should I choose square or elongated?
Square (1.00–1.10 L:W) for a classic pillow shape. Elongated (1.15–1.30) for a finger-lengthening effect. Try both if possible — many buyers are surprised by which they prefer.
8. Do cushion cuts have a bow-tie effect?
Rarely and mildly. Unlike ovals and pears, cushion cuts do not typically show significant bow-tie shadowing. This is one of their advantages over other fancy shapes.
9. Are lab-grown cushion cuts available?
Yes, in both brilliant and modified brilliant sub-types. Lab-grown cushion cuts are 60–80% less expensive with identical optical properties.
10. How does a cushion cut compare to oval?
Cushion produces more fire, oval produces more brilliance. Cushion looks vintage, oval looks modern. Oval faces up ~10% larger. Both cost 20–35% less than round. The choice comes down to aesthetic preference.
Explore Cushion Cut Diamonds at Bijolina
At Bijolina, our cushion cut collection spans both brilliant and modified brilliant sub-types in every quality tier. Every diamond is independently certified and photographed in detail.
Use code WELCOME10 at checkout for 10% off your first purchase. Every order includes free shipping, a 14-day return window, and our lifetime warranty on all fine jewelry.