Diamond shape is the first decision most couples make — and often the most personal. Shape defines the entire silhouette of the ring. It communicates style, personality, and aesthetic in a way no other feature can. Here's what you need to know about each major diamond shape.
Round Brilliant: The Benchmark of Sparkle
The round brilliant is the most popular diamond shape in the world, and for good reason: its 57–58 facets are mathematically engineered to maximize light return. No other shape produces more fire and brilliance. It's also the most forgiving of the shapes — lower color and clarity grades still look beautiful because of the intense sparkle masking imperfections.
The trade-off: round diamonds command a premium. They require more rough diamond to be cut away during production, which drives up the price per carat compared to most fancy shapes.
Oval: Modern Elegance with a Lengthening Effect
The oval has surged in popularity over the past decade, and it's easy to see why. It combines the brilliance of a round with an elongated silhouette that makes fingers appear longer and slimmer. Ovals also tend to face up larger than rounds of the same carat weight. Watch for the "bowtie effect" — a shadow across the center common in ovals — and ask to view each stone carefully before selecting.
Cushion Cut: Romantic and Timeless
With soft rounded corners and larger facets, the cushion cut has an antique warmth that feels both classic and romantic. It's available in square or rectangular proportions and in different faceting patterns — "crushed ice" cushions produce a scattered sparkle, while "chunky" cushions deliver broad flashes of light similar to a round. Cushion cuts pair beautifully with halo and vintage-style settings.
Emerald Cut: Architecture in Diamond Form
The emerald cut is defined by its rectangular shape and parallel step-cut facets, which create a hall-of-mirrors effect rather than the sparkle of a brilliant cut. It's the choice of someone who appreciates understated sophistication and architectural beauty. Because of its open table, emerald cuts require higher clarity — inclusions are more visible. Aim for VS2 minimum, ideally VS1 or better.
Pear: Unique and Dramatic
A hybrid of the round and marquise, the pear shape tapers to a single point at one end. It's one of the most distinctive diamond shapes available — glamorous, elongating, and undeniably attention-grabbing. Traditionally worn with the point toward the fingertip, though some prefer it reversed. Like ovals, pears can show a bowtie, so evaluate each stone individually.
Princess Cut: Contemporary and Geometric
The princess is the most popular fancy shape after oval, featuring a square outline with brilliant-style faceting that produces exceptional sparkle. It's modern and geometric — a natural choice for someone who loves clean lines. One consideration: the pointed corners are more vulnerable to chipping, so a four-prong or bezel setting that protects the corners is wise.
Marquise: Bold and Elongating
The marquise (mar-KEEZ) features two pointed ends and an oval body — a shape originally commissioned by King Louis XV of France for his mistress. It's one of the most elongating of all diamond shapes and produces a striking, fashion-forward look. Marquise diamonds face up very large relative to their carat weight, making them an excellent choice for buyers who prioritize visual size.
How to Choose
Think about her personal style — does she lean classic or contemporary? Does she like statement pieces or understated elegance? If she wears jewelry, look at what she already has. If you're unsure, round and oval are the safest choices for broad appeal. And when in doubt — ask. Most partners are happy to share their preferences, and involving her in the process often makes the story even better.
At Atelier Diamante, we source diamonds in every shape and help you find the one that's right for her. Book a consultation to get started.