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Gold$4,029.91·Silver$56.88·Platinum$1,658.35
Oval cut diamond

Oval Diamond

The oval diamond combines the brilliance of a round brilliant with an elongated silhouette that creates the illusion of greater size. It has surged in popularity over the past decade, becoming the second most requested shape for engagement rings.

Is a oval diamond a good choice?

Oval diamonds are known for very high brilliance with 58 facets. They're popular for engagement rings and halo settings. Here are the trade-offs.

Why people love it

  • +Looks about 10% larger than a round of the same carat weight
  • +Elongated shape creates a flattering, finger-lengthening effect
  • +15-25% less expensive than equivalent round brilliants
  • +Excellent brilliance, comparable to round in well-cut stones
  • +Modern and fashionable while still being a timeless choice

Things to know

  • Most ovals show some bow-tie shadow. Severity varies with cut quality.
  • No standardized cut grade from labs, so you need to evaluate with photos or video
  • Color tends to show more at the pointed ends than in rounds
  • A poorly cut oval can look dull or overly glittery instead of brilliant

How big is a oval diamond? (MM to carat)

A 1-carat oval diamond measures approximately 7.7 x 5.7 mm. Here are the most common sizes from 0.25 ct to 5 ct.

Carat WeightSize (mm)
0.25 ct5 x 3.5 mm
0.33 ct5.5 x 4 mm
0.5 ct6 x 4.5 mm
0.75 ct7 x 5 mm
1 ct7.7 x 5.7 mm
1.25 ct8 x 6 mm
1.5 ct8.5 x 6.5 mm
2 ct9 x 7 mm
2.5 ct9.5 x 7.5 mm
3 ct10.5 x 7.5 mm
4 ct11.5 x 8.5 mm
5 ct12.5 x 9 mm

View full oval size chart → with all sizes from melee to 5+ carats.

How to buy a oval diamond

  • Always request video or high-quality images to evaluate bow-tie severity. Lab reports won't tell you.
  • Stick to L/W ratios between 1.35-1.50 for the most balanced, classic oval shape
  • Color is more visible in ovals than rounds. Consider staying H color or higher, especially in white gold or platinum.
  • Check symmetry carefully: the two halves should mirror each other and the ends should match in width
  • VS2 or SI1 clarity is usually eye-clean in ovals, but verify inclusions aren't concentrated at the narrow ends
  • Consider a six-prong setting with prongs at the tips to protect the pointed ends from chipping

What makes a oval diamond unique?

The oval brilliant was developed by Lazare Kaplan in the 1960s as a modified brilliant cut that retains the fire and scintillation of a round while offering a more distinctive look. The elongated shape flatters the finger by creating a lengthening effect, which is one of the primary reasons it has become so popular for engagement rings. One of the key considerations with ovals is the bow-tie effect, a dark shadow that appears across the center of the stone when viewed face-up. Nearly all ovals exhibit some degree of bow-tie, but in well-cut stones it is minimal and adds depth to the stone's appearance. A pronounced bow-tie, however, indicates poor light return in the center and should be avoided. Because labs do not provide cut grades for ovals, evaluating bow-tie severity requires visual inspection or high-quality imagery. From a value perspective, ovals typically cost 15-25% less than equivalent round brilliants because they retain more rough crystal weight during cutting. Their elongated shape also means they face up larger than rounds of the same carat weight. A 1-carat oval appears roughly 10% larger than a 1-carat round when viewed from above. This combination of lower price and larger appearance makes ovals an excellent value proposition for budget-conscious buyers who don't want to sacrifice visual impact.

How much does a oval diamond cost?

Oval diamonds are priced at 15-25% less than round brilliant. Price depends on carat weight, color, clarity, and cut quality. For a personalized estimate, use our diamond price estimator.

Estimate oval diamond price →

How does the oval compare?

Technical Specifications

Facets
58
Brilliance
very high
L:W Ratio
1.30:1 to 1.50:1 (classic oval), with 1.35-1.45:1 most popular

Last updated: 2026-07-16

At a Glance

Price vs Round
15-25% less than round brilliant
Popularity
Second most popular shape, rapidly growing (approximately 20% of engagement ring sales)
Sparkle
very high

Best For

engagement ringshalo settingsthree-stone ringssolitaire settingseast-west settings

Setting Ideas

Related Shapes