Oval Diamond Engagement Rings: The Complete Buying Guide
Why Oval Diamonds Are So Popular Right Now
If you have spent any time on jewellery inspiration boards over the past few years, you will have noticed that the oval diamond is everywhere. It has become the defining engagement ring shape of this decade, appearing on the hands of celebrities and quietly overtaking the round brilliant at many fine jewellery studios worldwide, including ours at Diamond Ateliers.
The reasons are easy to understand. The oval combines the brilliance of a round cut — it is a modified brilliant, using the same style of facets — with the elongating, finger-flattering effect of a fancy shape. It looks larger than a round brilliant of the same carat weight because its elongated outline covers more surface area on the finger. And it occupies a comfortable middle ground between classic and distinctive: recognisably a diamond ring, but with a personality of its own.
The Oval's Key Characteristics
The oval diamond has no official grading standard for cut quality — unlike the round brilliant, which receives a GIA cut grade, fancy shapes are assessed visually. This makes choosing an oval more personal and more hands-on than choosing a round, but also more rewarding when you find the right stone.
The most important visual characteristics to evaluate in an oval diamond are its length-to-width ratio, the severity of the bowtie, its symmetry, and its overall face-up appearance in natural light.
Length-to-Width Ratio: Finding Your Oval
The length-to-width ratio describes how elongated the oval is. A ratio of 1.0 would be a perfect circle; most ovals fall between 1.3 and 1.7, with the most popular range sitting at 1.35 to 1.50.
A shorter oval (ratio around 1.3) looks rounder and more classic, closer in silhouette to a round brilliant. It suits clients who want the benefits of the oval shape but in a subtler form.
A longer oval (ratio 1.5 and above) has a more dramatic, elongated appearance that maximises the finger-lengthening effect. It tends to look larger on the hand and creates a stronger visual statement.
There is no objectively correct ratio — it depends on the wearer's finger width and their personal taste. We always encourage clients to view ovals at different ratios in person before deciding. The difference between a 1.35 and a 1.55 oval is significant on the hand and hard to appreciate from a certificate alone.
The Bowtie Effect
Almost every oval diamond displays some degree of bowtie — a dark shadow across the centre of the stone that resembles the shape of a bowtie when viewed face-up. It is caused by light leaking out of the elongated middle section of the stone rather than returning to the eye.
A minor bowtie is normal and largely unnoticeable in everyday conditions. A strong bowtie creates a dark, dull band across the centre of the stone that undermines its brilliance and is visible on the hand. Because the GIA does not grade cut on ovals, the certificate gives you no indication of bowtie severity — you must view the stone in person, in natural light, before buying.
At Diamond Ateliers, we evaluate the bowtie on every oval diamond we source for clients. We only work with stones where the bowtie is minimal and does not affect the face-up appearance of the stone.
Symmetry and Wing Shape
A well-cut oval should have perfectly symmetrical wings — the two curved sides should mirror each other exactly. Viewed face-up, the stone should look like a clean, even ellipse with no flat edges, pointed ends, or uneven curvature on one side.
Hold the stone under a loupe or ask your jeweller to show it to you under magnification from directly above. Any asymmetry in the outline will be apparent when the ring is on the finger, particularly in a simple solitaire setting where there is nothing to distract from the stone's silhouette.
Colour and Clarity for Oval Diamonds
Ovals are a modified brilliant, so they mask colour and clarity better than step cuts but less effectively than a round brilliant. The facet arrangement creates more internal light scattering than an emerald cut, which helps camouflage minor inclusions.
For colour, we recommend G or H for an oval set in white gold or platinum. The pointed ends of an oval (less pronounced than a marquise, but still present) can concentrate body colour slightly, so going below H in a white metal setting can result in a stone that looks warmer than expected face-up.
For clarity, VS2 is a reliable minimum. Many SI1 ovals are eye-clean, but it depends entirely on the type and position of the inclusion — this must be assessed stone by stone. We always evaluate clarity in person for every oval we present to clients.
Size Advantage: Why Ovals Look Bigger
One of the most practical reasons to choose an oval is its visual size advantage over a round brilliant of the same carat weight. Because of the elongated outline, a 1.5ct oval diamond typically looks comparable in visual impact to a 1.8–2.0ct round brilliant. The stone covers more surface area on the finger, making its presence felt more immediately.
This is a meaningful advantage for clients who have a specific carat weight in mind but want maximum visual impact. It is also relevant when comparing lab and natural diamond options: a 1.5ct lab oval at a fraction of the price of a 1.5ct natural round can often achieve a comparable or larger visual result on the hand.
Best Settings for Oval Diamonds
Solitaire with a Thin Band
The most popular setting for an oval, and for good reason. A fine platinum or 18k gold band — typically 1.5–2mm wide — keeps the focus entirely on the stone. The oval's elongated silhouette does all the visual work. A four-prong or six-prong solitaire is the classic choice; six prongs offer additional security for a stone of 1.5ct and above.
Hidden Halo
A row of micro pavé diamonds tucked beneath the bezel of the oval, visible from the side and profile but not interrupting the clean face-up view of the centre stone. This is one of our most requested designs at Diamond Ateliers — it adds brilliance and apparent size without changing the solitaire aesthetic when viewed from above.
Traditional Halo
A full ring of pavé diamonds surrounding the oval amplifies its size dramatically and creates a very lush, romantic look. For clients who want maximum presence from a modest carat weight, an oval with a diamond halo is one of the best value-for-visual-impact combinations available.
East-West Setting
Rotating the oval 90 degrees so the long axis runs across the finger rather than up and down creates a contemporary, architectural look. This orientation reads very differently — wider and lower on the hand — and suits clients who want something unconventional. It also tends to sit lower on the finger, making it more practical for active daily wear.
Three-Stone
An oval centre stone flanked by two smaller ovals, rounds, or pear-shaped side stones creates a classic three-stone composition. The oval centre sits beautifully in this arrangement and the additional stones add carat weight and sparkle without a traditional halo structure.
Oval Diamonds in Lab-Grown Stones
The oval is one of the most popular shapes in lab-grown diamonds, and for good reason. The size advantage of the oval shape means you get even more visual impact per carat — and lab diamonds are already less expensive than natural diamonds of equivalent quality. A 2.0ct lab oval diamond in a hidden halo setting, which would be a very significant piece, becomes genuinely accessible. We source lab oval diamonds specifically for their face-up appearance, symmetry, and bowtie, applying the same quality standards we use for natural stones.
Is the Oval Right for You?
The oval is the right choice if you want a ring that feels elegant rather than bold, that flatters the finger, that maximises the visual impact of your chosen carat weight, and that occupies that particular sweet spot between classic and distinctive. It is not the right choice if you want something completely understated (a round brilliant solitaire) or dramatically architectural (an emerald or asscher cut).
The best way to decide is to try one on. If you are in Singapore and considering an oval diamond engagement ring, we would love to show you what we have in stock and walk you through the variables that matter most.
Design Your Oval Ring at Diamond Ateliers
Every ring at Diamond Ateliers is made to order. We source the oval diamond first — evaluating bowtie, symmetry, colour, and clarity in person — and then design the setting around it. Whether you want a minimal solitaire or something more intricate, we build it in 18k gold or platinum.
Our showroom is at 176 Orchard Rd, #03-05 The Centrepoint, Singapore 238843. Book a consultation with no obligation.