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Back02/04/2026
When you start dreaming about a bespoke engagement ring or a custom piece of diamond jewellery, many people think the first decision is the setting, the metal, or even the budget.
But in reality, the diamond shape is usually the very first — and most important — choice you’ll make.
Whether your diamond is earth-mined or lab-grown, the shape defines the entire personality of your ring. It influences how big the diamond looks, how the light reflects, how it sits on the hand, and the overall style — classic, modern, romantic or bold.
At Harmony Jewels, we always say: choose the shape first, and the rest of the design naturally follows.
To help you navigate your options, here’s an easy guide to the most loved diamond shapes, so you can discover which one feels most like you.
The round brilliant is the most popular diamond shape in the world, and for good reason.
It’s designed to maximise sparkle, with carefully calculated facets that bounce light beautifully. If you love timeless elegance and unbeatable brilliance, round is hard to beat.
Perfect for: classic styles, maximum sparkle, and designs that never date.
Famously worn in an engagement ring by Mila Kunis, proving round diamonds never go out of style.
Oval diamonds offer incredible brilliance similar to round cuts but with a more elongated silhouette.
They tend to make the finger look longer and slimmer, and they often appear larger than round diamonds of the same weight — a lovely bonus.
Perfect for: modern elegance with plenty of sparkle.
Oval diamonds gained huge popularity after Hailey Bieber received her now-iconic oval engagement ring.
The cushion cut has soft, rounded corners and a pillow-like shape. The elongated version adds a modern feel while keeping that romantic softness.
It’s an increasingly popular choice for bespoke engagement rings thanks to its vintage charm mixed with contemporary proportions.
Perfect for: romantic souls who want something classic but distinctive.
Zendaya’s engagement ring helped bring renewed attention to the elegant elongated cushion cut.
The traditional cushion cut is squarer, with rounded corners and a softer sparkle compared to round diamonds.
It feels warm, timeless, and slightly vintage — perfect for those drawn to classic designs with character.
Perfect for: vintage-inspired and soft, elegant styles.
Sofía Vergara’s cushion-cut engagement ring perfectly reflects this shape’s timeless glamour.
Emerald cuts are all about elegance and clarity. Instead of intense sparkle, they feature long step-cut facets that create a mesmerising “hall of mirrors” effect.
This shape highlights the diamond’s purity and has a refined, architectural feel.
Perfect for: lovers of minimalist and sophisticated jewellery.
Demi Lovato’s emerald-cut engagement ring showcased the shape’s clean, sophisticated beauty.
Also called a teardrop shape, pear diamonds combine the brilliance of round with the elongation of marquise.
They feel graceful, distinctive and slightly playful, and can be worn pointing up or down depending on personal style.
Perfect for: brides wanting something elegant with personality.
Megan Fox’s distinctive pear-shaped engagement ring made this cut feel bold and modern again.
The marquise shape, with its pointed ends and elongated form, was originally created for royalty.
It maximises surface area, meaning it often looks larger than other shapes of the same carat weight.
Perfect for: bold styles and those who want a standout ring.
The marquise cut recently returned to the spotlight thanks to Selena Gomez’s elegant ring choice.
A heart-shaped diamond is romantic in the most literal way. It requires expert cutting to maintain symmetry and brilliance, making it a special and expressive choice.
Perfect for: true romantics who love meaningful design.
Avril Lavigne’s heart-shaped engagement ring perfectly captured the romantic spirit of this unique cut.
Similar to emerald cut but square, the Asscher cut has deeply trimmed corners and dramatic step facets.
It feels both vintage and strikingly modern, attracting those who appreciate Art Deco aesthetics.
Perfect for: lovers of vintage glamour with strong character.
Pippa Middleton’s engagement ring highlighted the refined, vintage appeal of the Asscher cut.
Princess cuts are square or slightly rectangular and offer excellent brilliance, second only to round cuts.
They combine modern lines with intense sparkle, making them one of the most popular contemporary choices.
Perfect for: modern brides wanting clean lines and sparkle.
Kate Bosworth’s princess-cut engagement ring shows how modern sparkle can still feel timeless.
There’s no right or wrong choice, only what feels right when you see it on your hand.
Some people fall in love with sparkle, others with elegance, and others with unique shapes that reflect their personality. Trying different shapes, seeing proportions, and understanding how they look in real life makes all the difference.
And that’s exactly where we come in.
If you’re ready to explore diamond shapes and start designing your bespoke piece, we’d love to welcome you.
You can visit us in our Hatton Garden showroom to see diamonds in person, compare shapes, and work with our experts to create something truly personal.
Or, if you prefer to start from home, you can book a free 5–15 minute virtual consultation with our team and begin your bespoke journey in a relaxed, friendly way.
✨ Your perfect diamond shape — and your future ring — are waiting to be discovered.