A diamond's shape is the first thing anyone notices, and it sets the tone for the entire ring. In 2026, the round brilliant still leads, accounting for roughly half of all diamonds sold, but the real story this year is the rise of elongated fancy shapes. Couples want stones with character, an elongating effect on the finger, and a look that feels personal rather than standard. Warm tones and yellow gold have come back strongly too, which plays beautifully into shapes that show off color.
Here are the ten diamond shapes drawing the most attention in 2026, what makes each one special, and a piece from our collection to show how it looks set.
1. Round brilliant
The round brilliant remains the most popular shape in 2026 by a wide margin, holding roughly half of the market. Its 58 facets are engineered to return the maximum amount of light, which is why nothing else sparkles quite like it. It is the safe, timeless choice that flatters every hand and pairs with any setting. See it at its purest in our 3.03 CT round brilliant solitaire engagement ring in platinum.
2. Oval
If round is the classic, oval is the shape of the moment. It is the fastest-growing fancy shape in 2026, often credited to the "oval effect" of high-profile rings like Hailey Bieber's. An oval delivers nearly all of a round's brilliance, while its elongated outline makes the stone look larger and lengthens the finger. It looks especially current in an east-west orientation or a slim halo, as in our 4.52 CT oval and half-moon three-stone ring.
3. Emerald
The emerald cut is having a serious moment. A step cut with long, parallel facets, it trades sparkle for what jewelers call a "hall of mirrors" effect: clean, architectural flashes of light. It suits the Art Deco and vintage-inspired settings that are surging in 2026, and it reads as understated and sophisticated. Our 2.0 CT emerald-cut hidden halo engagement ring in platinum shows how a hidden halo adds quiet sparkle without softening the shape's clean lines.
4. Cushion
Cushion cuts, with their softly rounded corners and romantic glow, remain a favorite, and the elongated cushion (the modern cousin of the antique old mine cut) is one of the most talked-about shapes of the year, thanks in part to Taylor Swift's engagement ring. The shape pairs naturally with halos and warm metals. Our 4.17 CT cushion-cut fancy yellow diamond halo ring shows how flattering a cushion looks when the warmth of the stone is the centerpiece.
5. Pear
Often called the teardrop, the pear is rising fast as the natural next step for couples who love the oval but want something more distinctive. It is bold and directional, elongating the finger when the point faces outward, and it carries real presence for its carat weight. It is a standout in colored diamonds, as in our 5.69 CT pear-shaped fancy yellow diamond ring.
6. Radiant
Think of the radiant as the round's edgier cousin: cropped corners, a rectangular or square outline, and serious brilliance that sits comfortably between the cushion and the princess. The faceting hides inclusions well and lights up beautifully, which makes it a favorite for fancy colored diamonds. See it in our 3.64 CT radiant-cut fancy yellow diamond halo ring.
7. Marquise
The marquise is enjoying a genuine revival in 2026, helped along by Selena Gomez's now-iconic ring. Its long, pointed silhouette is one of the most dramatic shapes available and creates a striking lengthening effect, while its broad surface area makes a carat go a long way. Our 3.56 CT fancy yellow marquise diamond ring captures the cut's vintage drama.
8. Princess
Once the second most popular shape on the market, the princess remains a strong modern-classic choice. Its square outline and sharp corners give off crisp, geometric flashes that feel cleaner and more contemporary than a round's soft brilliance. It is a natural fit for sleek channel-set bands like our 5.38 CT channel-set princess-cut eternity ring in platinum.
9. Asscher
A close relative of the emerald cut, the Asscher is a step-cut square with cropped corners and a mesmerizing, almost hypnotic depth. It is the definitive Art Deco shape, riding the same vintage-revival wave that is lifting emerald cuts, and it rewards a high-clarity stone. Our 6.65 CT Asscher and trapezoid three-stone ring in platinum is a clean showcase of the geometry.
10. Heart
The most romantic shape of all, the heart is a modified brilliant cut that requires excellent symmetry to look its best, since any imbalance is immediately visible. It is less common than the shapes above, which is exactly its appeal for buyers who want something unmistakably personal. We love it as a statement in colored diamonds, as in our 5.82 CT heart-shape fancy yellow diamond necklace.
Quick reference: 2026 diamond shapes
| Shape | Character | Why it is popular in 2026 |
|---|---|---|
| Round brilliant | Maximum sparkle, timeless | Still No. 1, roughly half the market |
| Oval | Brilliant, elongating | Fastest-growing fancy shape |
| Emerald | Step cut, hall of mirrors | Art Deco revival, rising sharply |
| Cushion | Soft corners, romantic glow | Elongated cushion is a 2026 favorite |
| Pear | Teardrop, directional | The next step after oval |
| Radiant | Cropped corners, brilliant | Great for fancy colored diamonds |
| Marquise | Long, pointed, dramatic | Strong revival in 2026 |
| Princess | Square, geometric | Modern-classic, clean lines |
| Asscher | Step-cut square, deep | Vintage and Art Deco appeal |
| Heart | Romantic, distinctive | Personal, stands apart |
How to choose your shape
Trends are a useful starting point, but the right shape is the one that suits the wearer's hand, style, and the way they live. A few quick guidelines:
For maximum sparkle
Round brilliant, oval, and radiant return the most light and hide everyday wear well.
For a larger look per carat
Elongated shapes - oval, marquise, pear, and emerald - spread across the finger and read larger than their carat weight suggests.
For a vintage or Art Deco feel
Emerald and Asscher step cuts pair perfectly with milgrain, filigree, and geometric settings.
For showing off color
Radiant, cushion, and oval are the classic choices for fancy yellow diamonds, our specialty - the faceting concentrates and intensifies the color. Explore the full range in our yellow diamond collection.
Every diamond we sell is natural and earth-mined, and our loose stones are GIA certified, so you always know exactly what you are buying. Browse shapes side by side in our engagement ring collection and loose diamond collection, or let our custom design service build a ring around the exact shape, carat, and color you have in mind, with a 3D preview before anything is made.
The best way to choose is to see the shapes in person, where the differences in brilliance, outline, and how each one sits on your hand become obvious. Come compare them with us.
Book Your Personal Consultation
Connect with our experts online from anywhere
Meet with our expert sales consultants in-store
