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Colorless Oval Cut Diamond Rings
オーバルカットダイヤモンドリング
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Oval Colorless F Diamond Ring - 1.697ct
Regular price ¥480,000 (Tax incl.)Unit price per -
18K Oval-cut Near Colorless Diamond Ring - 1.25ct
Regular price ¥430,000 (Tax incl.)Unit price per -
18K Oval-cut Near Colorless Diamond Ring - 1.06ct
Regular price ¥590,000 (Tax incl.)Unit price per -
18K Oval-cut Colorless Diamond Ring - 1.764ct
Regular price ¥1,200,000 (Tax incl.)Unit price perNEW -
18K Oval-cut Colorless Diamond Ring - 1.051ct
Regular price ¥850,000 (Tax incl.)Unit price per -
18K Colorless Oval Diamond Ring - 0.682ct
Regular price ¥390,000 (Tax incl.)Unit price per -
18KYG Colorless Diamond Ring Oval-cut - 0.635ct
Regular price ¥350,000 (Tax incl.)Unit price per -
18K Oval-cut Colorless Diamond Ring - 0.835ct
Regular price ¥460,000 (Tax incl.)Unit price per -
18K Oval-cut Near Colorless Diamond Ring - 1.049ct
Regular price ¥790,000 (Tax incl.)Unit price per -
Sold outFlower Design Diamond Ring - 1.591ct
Regular price ¥290,000 (Tax incl.)Unit price perSold out -
Sold outRound Colorless Diamond Ring - 0.999ct
Regular price ¥550,000 (Tax incl.)Unit price perSold out -
Sold outOval Colorless Diamond Ring - 1.377ct
Regular price ¥720,000 (Tax incl.)Unit price perSold out -
Sold outOval Colorless Diamond Ring - 0.93ct
Regular price ¥470,000 (Tax incl.)Unit price perSold out -
Sold outOval Colorless Diamond Ring - 0.944ct
Regular price ¥470,000 (Tax incl.)Unit price perSold out -
Sold outPT900 Oval-cut Near Colorless Diamond Ring - 0.477ct
Regular price ¥180,000 (Tax incl.)Unit price perSold out
How to Choose an Oval Cut Diamond Ring
What Is an Oval Cut Diamond?
An oval cut diamond features a graceful, elongated silhouette with rounded ends. It was developed in the 1960s by gem cutter Lazare Kaplan, making it relatively modern compared to many other diamond shapes. Oval cut shares the same 58-facet structure as round brilliant cut, which allows it to achieve a similar level of brilliance and sparkle. Its defining advantage is that the elongated shape typically appears larger than a round diamond of the same carat weight, while also creating a visually slimming effect on the finger. These combined qualities have made oval cut a consistently popular alternative to round for buyers wanting something distinctive without sacrificing brilliance.
Proportion and the Bowtie Effect
Length-to-width ratio significantly affects how an oval cut diamond appears. A ratio of roughly 1.35 to 1.50 is generally considered the most balanced and popular proportion — lower ratios appear closer to round, while higher ratios create a more elongated, dramatic silhouette. One characteristic to be aware of with oval cut is the "bowtie effect" — a dark, bowtie-shaped shadow that can appear across the center of the stone. This is an inherent feature of the elongated brilliant-cut structure and cannot be entirely eliminated, but higher cut quality minimizes its visibility significantly. Viewing the actual stone in person is the most reliable way to assess this before purchasing.
Clarity and Color Grade
Because oval cut diamonds have a large open table facet, inclusions can be slightly more visible than in round brilliant cut. VS1 clarity or higher is generally ideal, though our collection ranges from VS1 through SI2 — depending on inclusion location, SI1 or SI2 stones can still appear eye-clean. On color, our collection focuses on D through F colorless grades, as oval cut diamonds can sometimes show a hint of color concentration near the pointed ends. For buyers prioritizing maximum whiteness, D through F is the recommended range.
Metal and Carat Weight
We offer oval cut diamond rings in 18K white gold, 18K yellow gold, and platinum. White gold and platinum best showcase the bright white brilliance of a colorless diamond. Our collection ranges from ¥350,000 (0.635ct VS1) to ¥1,200,000 (1.764ct VS2), with 0.7ct to 1.2ct being a particularly popular range for engagement rings. Because oval cut tends to look larger than round at the same carat weight, it's also a strong option for buyers wanting a more impressive presence within a given budget. If you have questions about proportion or budget, contact us or visit our office in Okachimachi.
Frequently Asked Questions
An oval cut diamond features a graceful, elongated silhouette with rounded ends. Developed in the 1960s by gem cutter Lazare Kaplan, it shares the same 58-facet structure as round brilliant cut, giving it comparable brilliance. Its elongated shape typically appears larger than a round diamond of the same carat weight and creates a visually slimming effect on the finger.
The bowtie effect is a dark, bowtie-shaped shadow that can appear across the center of elongated shapes like oval cut. It is an inherent feature of the cut's structure and cannot be entirely eliminated, but higher cut quality significantly reduces its visibility. Viewing the stone in person is the most reliable way to assess it before purchasing.
Generally yes. At the same carat weight, oval cut diamonds have a larger visible surface area than round cut, due to their elongated shape. This makes oval a popular choice for buyers wanting a more impressive visual presence within a given budget. Browse our round cut diamond ring collection to compare.
Yes. All oval cut diamond rings at Weiss come with a GIA or CGL certificate, detailing color grade, clarity, and carat weight so you can evaluate quality objectively before purchasing.
Oval cut offers brilliance comparable to round cut combined with a finger-elongating effect and a larger apparent size at the same carat weight. It provides a distinctive alternative to the most conventional shape while remaining elegant and versatile, making it popular with buyers who want something a little less common without straying far from a classic look.
Yes. Our appointment-only office is in Okachimachi, Tokyo. Proportion and the bowtie effect are much easier to evaluate in person, so we recommend a visit before purchasing. Please book an appointment through our contact page or by phone.
Yes. We can create a custom oval cut diamond ring based on your preferred carat weight, color grade, clarity, length-to-width ratio, and metal. You can also browse our loose oval cut diamond collection to select a specific stone. Contact us to begin.