Diamond Education

Oval diamonds have surged in popularity over the past decade, becoming one of the most sought-after diamond shapes for engagement rings and fine jewelry. With their elegant shape, brilliant sparkle, and flattering finger coverage, it's easy to see why so many people are choosing ovals.

What Is an Oval Cut Diamond?

An oval cut diamond is a brilliant-cut diamond with an elongated, elliptical shape. When viewed from above, it forms a perfect oval outline, rounded at both ends with gently curving sides. The oval cut combines the iconic sparkle of a round brilliant with a more distinctive, contemporary profile, offering a refined balance of tradition and individuality.

The History of the Oval Cut Diamond

Oval cut diamonds have existed, in some form, since as far back as the 1300s. But the modern oval cut was created and perfected by Russian-born diamond cutter Lazare Kaplan in 1957, offering a glamorous alternative to the more traditional round cut. Working in New York City, Kaplan developed the oval as a direct descendant of the round brilliant cut, with the goal of creating a larger-looking stone with similar brilliance. By optimizing the facet pattern specifically for light performance, he transformed the oval from a novelty into a legitimate alternative to the round brilliant—offering comparable sparkle in a more glamorous form.

Oval Cut Diamond Basics

Ovals belong to the "fancy shape" category. They're typically brilliant-cut, similar to rounds, princess cuts, and pear shapes. This distinguishes them from step-cut diamonds like emeralds and asschers, which produce flashes rather than sparkle.

Oval diamonds feature no sharp corners or vulnerable points, making them more durable for everyday wear than shapes like princess, marquise, or pear cuts. Their elongated form creates two key visual effects: they appear larger than rounds of the same carat weight due to greater surface area, and they make fingers look longer and more slender. While ovals have surged in popularity over the past decade—becoming one of the most requested engagement ring shapes—each oval is unique in its proportions, bow-tie pattern, and overall appearance, meaning careful selection is essential to finding the right one for you.

How Oval Diamonds Are Cut

Oval diamonds feature 58 facets arranged in a brilliant-cut pattern—the same number as round brilliants. The facet structure includes a table (the flat top surface), a crown (the upper portion), a girdle (the widest part), and a pavilion (the lower portion that comes to a point or culet). The key difference from rounds is that all these elements are elongated rather than circular.

The cutting process requires exceptional skill because the elongated shape creates unique challenges. The cutter must precisely calculate angles and proportions to ensure light enters through the table, reflects internally off the pavilion facets, and returns through the crown to create maximum brilliance. Even slight miscalculations can result in light leakage, creating dark areas or the bow-tie effect that ovals are known for.

Understanding the Brilliance of Oval Diamonds

Both oval and round diamonds are brilliant-cut shapes and feature a similar number of facets, which is why ovals offer strong sparkle. However, the brilliance of an oval diamond is typically slightly less than that of a round brilliant cut. This difference is due to the oval's elongated shape, which affects how light is distributed across the stone. That said, oval-cut diamonds still deliver impressive brilliance in fine diamond jewelry. When well cut, they reflect light beautifully and offer a lively, eye-catching sparkle.

Pros and Cons of Oval Diamonds

• Larger Appearance: Ovals look 10–15% larger than rounds of equal carat weight, giving you more diamond for your money and maximum visual impact.
• Finger Elongation: The elongated shape creates the optical illusion of longer, more slender fingers—one of the most universally flattering effects in diamond shapes.
• Brilliant Sparkle: With 58 brilliant-cut facets, ovals offer exceptional light performance that rivals rounds. Well-cut ovals are dazzlingly bright.
• Unique Yet Classic: Ovals feel distinctive and fashion-forward while remaining elegant and timeless.
• Versatility: Ovals work beautifully in virtually any setting style—solitaires, halos, three-stone, vintage, modern, and east-west orientations.
• Better Value: Ovals cost 20–30% less than comparable round diamonds, offering significant savings that can be allocated to higher quality or larger size.
• Durability: No sharp corners or points means less vulnerability to chipping compared to princess, pear, or marquise cuts.
• Trending: Ovals are highly fashionable and popular with celebrities, making them feel current and stylish.

Cons of Choosing an Oval Diamond

• Bow-Tie Effect: Almost all ovals show some degree of bow-tie, which can range from barely noticeable to quite distracting. Finding one with minimal bow-tie requires careful evaluation and may take longer.
• No Cut Grade: Without a GIA cut grade, evaluating quality is more complex and requires more research and scrutiny than with rounds.
• Can Show Color: The elongated shape can make color more visible, particularly at the ends, requiring higher color grades for a truly colorless look.
• Proportion Sensitivity: Small variations in the length-to-width ratio dramatically change the look. Finding your ideal proportions requires viewing multiple options.
• Symmetry Critical: Any asymmetry is immediately obvious and detracts significantly from appearance, so you must be selective about symmetry.

Oval diamonds are a great choice if you want maximum visual size for your budget, or if you want classic brilliance with a modern style.

The Bow-Tie Effect

All oval-shaped diamonds have a bow-tie effect to some degree. It appears as a dark area shaped like a bow-tie in the center of the stone, occurring when light leaks through certain facets instead of reflecting back to the viewer. While some degree of bow-tie is unavoidable in elongated shapes, its visibility varies greatly.

Well-cut ovals minimize the bow-tie so it appears subtle and only visible at certain angles, adding dimension rather than distraction. Because bow-tie is not graded on diamond certificates, it must be evaluated visually through videos or in-person viewing.

What to look for: Choose ovals with even brightness across the surface, where the bow-tie is faint and never dominates the stone's appearance.

How to Choose the Right Cut Quality

Unlike round brilliants, fancy shapes including ovals don't receive an overall cut grade from GIA. Instead, you must evaluate cut quality by examining proportions, symmetry, and polish individually, plus assess the bow-tie effect visually.

Key proportions for ovals:

• Table percentage: 53% to 63% (ideal around 56–60%)
• Depth percentage: 58% to 62% (ideal around 60–62%)
• Symmetry: Very Good to Excellent
• Polish: Very Good to Excellent

Well-proportioned ovals will exhibit strong brilliance with minimal bow-tie effect. Avoid ovals with very shallow or excessive depths, as these often display poor light performance or appear smaller than their carat weight suggests.

Length-to-Width Ratio: A Matter of Preference

The length-to-width ratio dramatically affects an oval's appearance:

• 1.30–1.35: Shorter, wider ovals that appear closer to round.
• 1.35–1.45: Classic oval proportions, most popular range.
• 1.45–1.50: Elongated, slender appearance.
• 1.50+: Very elongated, approaching marquise territory.

There's no "correct" ratio—it's entirely about personal preference and how the diamond looks on the hand. Longer ratios create more finger elongation but may emphasize the bow-tie effect.

Our Recommendation: Most people find ratios between 1.35 and 1.50 most appealing, with 1.40–1.45 being the most popular range. However, try different ratios in person or through virtual try-ons to see what suits your hand and personal aesthetic.

How to Choose the Right Diamond Clarity

The brilliance of an oval diamond hides inclusions quite well, meaning that the diamond clarity does not have to be flawless to appear flawless to the naked eye. A clarity grade of SI1 (Slightly Included) or VS2 (Very Slightly Included) tends to offer an ideal balance of beauty and value. Avoid diamonds with dark inclusions near the center, where they are most noticeable.

How to Choose the Right Diamond Color

The elongated shape of an oval cut diamond may show color slightly more than a round diamond. That said, diamond color is a matter of personal preference. A color rating in the G–H range or higher indicates near-colorlessness and will look great on a white gold or platinum ring. A diamond with a warmer tone in the I–J range may look beautiful in yellow or rose gold settings.

Is Carat Weight Important for Oval Diamonds?

While diamond carat weight is an important consideration, it should be evaluated alongside cut, color, and clarity for a well-balanced diamond choice. Oval-shaped lab diamonds often appear 10–15% larger than round diamonds of the same carat due to their elongated shape, making ovals an excellent choice for those wanting maximum visual impact within their budget.

One thing to avoid is a diamond with too low a carat relative to its length-to-width ratio, which can make a diamond too shallow and create a pronounced bow-tie effect.

Bottom Line Recommendation

Oval cut diamonds offer an exceptional balance of brilliance, elegance, and value. Their flattering shape, strong sparkle, and versatility make them one of today's most compelling diamond choices. Take time to compare proportions, review videos carefully, and trust both certification and your own eye—you'll be rewarded with a stunning oval diamond that feels personal, timeless, and unmistakably special.

Oval Cut Diamond FAQs

What setting style should I choose for an oval diamond?

Oval cut diamonds shine in a wide range of settings. A solitaire setting offers a classic look that emphasizes the brilliance of the diamond, while a halo adds extra sparkle and makes the center stone feel larger. They're also beautiful in a three-stone design, which some choose for its symbolism.

What side stones match an oval cut diamond?

Pear-shaped, half-moon, or tapered baguette side stones beautifully complement an oval center in three-stone designs. Round brilliants are a popular choice for a halo setting.

Are oval shaped diamonds more expensive?

No. Oval diamonds are typically less expensive than round brilliants of comparable quality, offering excellent value.

Do oval shaped diamonds sparkle?

Yes. While slightly less brilliant than rounds, well-cut ovals still deliver exceptional sparkle and light performance.

What metals should be used for an oval cut engagement ring?

Oval cut diamonds are versatile and can pair beautifully with a variety of metals. Platinum and white gold enhance near-colorless oval diamonds, while yellow and rose gold beautifully complement oval cut engagement rings with warmer tones.