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Colorless Cushion Cut Diamond Rings
クッションカットダイヤモンドリング
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PT900 Cushion-cut Colorless Diamond Ring - 1.91ct
Regular price ¥570,000 (Tax incl.)Unit price perNEW -
18KYG Near Colorless I Cushion Diamond Ring - 0.873ct
Regular price ¥430,000 (Tax incl.)Unit price per -
18K Colorless Cushion-cut Diamond Ring - 0.844ct
Regular price ¥440,000 (Tax incl.)Unit price per -
18K Colorless Diamond Ring Cushion-cut - 1.12ct
Regular price ¥780,000 (Tax incl.)Unit price per -
18K Cushion-cut Near Colorless Diamond Ring - 2.32ct SI1
Regular price ¥1,150,000 (Tax incl.)Unit price per -
18K Cushion-cut Near Colorless Diamond Ring - 1.86ct
Regular price ¥1,250,000 (Tax incl.)Unit price per -
Sold out18K Cushion-cut Colorless Diamond Ring - 1.31ct
Regular price ¥990,000 (Tax incl.)Unit price perSold out -
Sold outCushion-cut Colorless Diamond Ring - 1.25ct
Regular price ¥1,250,000 (Tax incl.)Unit price perSold out -
Sold outCushion-cut Near Colorless Diamond Ring - 1.845ct
Regular price ¥590,000 (Tax incl.)Unit price perSold out
How to Choose a Cushion Cut Diamond Ring
What Is a Cushion Cut Diamond?
A cushion cut diamond features a rounded square or rectangular outline with larger facets than most other shapes, giving it a soft, pillow-like appearance — which is where its name comes from. The cut traces its roots to the "old mine cut" diamonds of the 1800s, making it one of the most historically rich shapes available today. While cushion cut produces less intense brilliance than round brilliant cut, its larger facets create a warmer, more diffused sparkle often described as having a candlelit quality. This combination of vintage heritage and timeless romance has kept cushion cut consistently popular across generations of fine jewelry, and it pairs equally well with antique-inspired and contemporary ring settings.
Square vs. Elongated Cushion Cuts
Cushion cut diamonds come in two general proportions. A square cushion has a length-to-width ratio of roughly 1.00 to 1.05, giving it a balanced, classic appearance. An elongated cushion has a ratio of 1.10 or higher, creating a more rectangular silhouette that visually lengthens the finger — a style that has grown increasingly popular in recent years for its slightly more modern look. The same carat weight can appear quite different depending on which proportion you choose, so it's worth trying both in person before deciding which suits your preference and hand shape best.
Clarity and How It Looks
Because cushion cut diamonds have larger facets than round brilliant cut, inclusions can be slightly more visible under close inspection. We generally recommend VS1 to VS2 clarity for cushion cut diamonds, though our collection ranges from VS1 through SI1 — depending on inclusion placement, SI1 stones can still appear eye-clean. On color grade, cushion cut's softer light-handling characteristics mean G through I color diamonds often look just as beautiful as higher grades, making this shape a popular choice for buyers who want to allocate more of their budget toward carat weight or clarity rather than top color grades.
Metal and Carat Weight
We offer cushion cut diamond rings in 18K white gold, 18K yellow gold, and platinum (PT900). Yellow gold enhances cushion cut's vintage character, while white gold and platinum create a cleaner, more modern contrast. Our collection ranges from ¥430,000 (0.873ct SI1) to ¥1,250,000 (1.86ct VS2), with 0.8ct to 1.2ct being a particularly popular range for engagement rings. If you have questions about which proportion or budget combination suits you best, contact us or visit our office in Okachimachi.
Frequently Asked Questions
A cushion cut diamond has a rounded square or rectangular outline with larger facets than most shapes, giving it a soft, pillow-like appearance. The cut traces its roots to old mine cut diamonds from the 1800s. It produces a warmer, more diffused sparkle than round brilliant cut, often described as having a candlelit quality, and carries a strong vintage character.
A round cut diamond is circular with 58 facets engineered to maximize brilliance and fire. A cushion cut diamond has a rounded square or rectangular shape with larger facets, producing a softer, warmer sparkle rather than maximum brilliance. Cushion cut carries a vintage character that round cut does not, making it a popular choice for buyers seeking something more distinctive. Browse our round cut diamond ring collection to compare.
A square cushion has a length-to-width ratio of roughly 1.00 to 1.05, offering a balanced, classic look. An elongated cushion has a ratio of 1.10 or higher, creating a more rectangular silhouette that visually lengthens the finger. Both are beautiful proportions, though elongated cushion cuts have grown increasingly popular in recent years. Trying both in person is the best way to determine your preference.
Yes. All cushion 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.
Because cushion cut diamonds have a softer light-handling character, G through I color grades often appear just as beautiful as higher D-F grades, with the difference being difficult to detect with the naked eye. This makes cushion cut a popular choice for buyers who prefer to allocate more of their budget toward carat weight or clarity rather than the highest color grades.
Yes. Our appointment-only office is in Okachimachi, Tokyo. You are welcome to compare square and elongated cushion proportions in person with guidance from our specialists. Please book an appointment through our contact page or by phone.
Yes. We can create a custom cushion cut diamond ring based on your preferred carat weight, color grade, clarity, proportion (square or elongated), and metal. You can also browse our loose cushion cut diamond collection to select a specific stone. Contact us to begin.