Diamond Shapes: The Complete Guide
Every diamond shape, explained — from the brilliant round to the elegant emerald — so you can choose the one that's right for your ring.
Quick answer
A diamond's "shape" is its outline — round, oval, cushion, emerald and so on. Brilliant-style shapes (round, oval, cushion, pear, marquise, princess, radiant, heart) maximise sparkle; step cuts (emerald, Asscher) favour clean lines and clarity. The best shape is personal. Every ring is made to order in solid 9, 14 or 18ct gold; diamonds natural or lab-grown, independently graded (GIA, IGI or HRD where applicable).
Shape vs cut — a quick note
People often use "shape" and "cut" interchangeably, but they're slightly different. Shape is the outline of the diamond (round, oval, emerald…). Cut also describes how well the diamond is faceted and how it returns light. On this page we focus on shape; for how cut, clarity, colour and carat work together, see our diamond 4Cs guide.
The diamond shapes
| Shape | Character | Guide |
|---|---|---|
| Round brilliant | The most fire and sparkle; timeless and forgiving | Read |
| Oval | Brilliant sparkle in an elongating shape; looks larger for its carat | Read |
| Cushion | Soft rounded corners; vintage feel with modern brilliance | Read |
| Princess | Square with sharp corners; crisp, contemporary sparkle | Read |
| Emerald | Rectangular step cut; clean lines, understated elegance | Read |
| Asscher | Square step cut; Art Deco "hall of mirrors" depth | Read |
| Pear | Teardrop; brilliant sparkle, elongating and distinctive | Read |
| Marquise | Long pointed oval; maximises apparent size, lengthens the finger | Read |
| Radiant | Rectangular with trimmed corners; brilliant faceting, bold sparkle | Read |
| Heart | Romantic brilliant shape; best a little larger to show the outline | — |
Tap Read for an in-depth guide to each shape. A heart-shape guide is on the way — and we can make any shape to order.
Brilliant cuts vs step cuts
Two broad families help you choose. Brilliant cuts (round, oval, cushion, pear, marquise, princess, radiant, heart) have many facets that scatter light for maximum sparkle — and they hide small inclusions well. Step cuts (emerald, Asscher) have long, open facets that give clean flashes and mirror-like depth, but reveal clarity more — so they suit a cleaner clarity grade. Sparkle vs clean lines is the core choice.
Choosing your shape — made to order
The right shape comes down to taste, the look you want on the hand, and how each wears day to day. Elongated shapes (oval, marquise, pear, emerald) can look larger for their carat and flatter the finger; round and princess are classic all-rounders. Every ring is made to order in solid 9, 14 or 18ct gold, never plated, with qualifying pieces UK hallmarked, typically within 14 days. Set on a shape you love? Start a bespoke enquiry and we'll make it to your specification.
Three ways to choose a shape
Because every band is made to order in your size and carat, you can keep the design you love and adjust the details to suit. Message our team on WhatsApp and we'll help you choose.
Frequently asked questions
What is the difference between a diamond's shape and cut?
Shape is the outline (round, oval, emerald…); cut also describes how well the diamond is faceted and returns light. A well-cut diamond of any shape looks brighter.
Which diamond shape sparkles the most?
The round brilliant returns the most light and fire, which is why it's the most popular shape.
Which shape looks biggest for the carat?
Elongated shapes such as oval, marquise and pear tend to look larger for their weight and lengthen the finger.
Which shapes hide inclusions best?
Brilliant cuts (round, oval, cushion, pear, marquise, princess, radiant, heart) hide small inclusions well; step cuts (emerald, Asscher) reveal them more, so choose a cleaner clarity.
Are all shapes available made to order?
Yes. Every shape can be made to order in solid gold, with diamonds independently graded by GIA, IGI or HRD where applicable.