Elongated Cushion - Lab Grown Diamond Jewelry

Exude elegance with our elongated cushion-cut lab grown diamond engagement rings. Featuring a stretched square shape with rounded corners, each diamond maximizes brilliance and creates a sophisticated, modern silhouette. Ethically sourced and expertly crafted, these rings combine timeless beauty with contemporary style. Perfect for proposals, anniversaries, and milestone moments, elongated cushion-cut engagement rings symbolize love, commitment, and refined luxury. 💍✨

Ready to ship worldwide Ready to ship worldwide
Easy 30-day returns Easy 30-day returns
Elongated Cushion - Lab Grown Diamond Jewelry
41 products

Elongated Cushion Lab Grown Diamond Engagement Rings

An elongated cushion takes the soft, rounded corners of a classic cushion and stretches them into a graceful rectangle. Elongated cushion lab grown diamond engagement rings suit brides who want a vintage-inspired shape with a modern, finger-lengthening silhouette. Each ring in this collection is handcrafted to order. It is a lovely middle ground for anyone torn between a classic cushion and an oval, and it pairs well with a straight or gently curved wedding band.

Why choose an elongated cushion lab grown diamond?

  • Flattering proportions – the longer outline draws the eye along the finger, making hands appear slimmer.
  • A larger look – stretched across the finger, it tends to look bigger face up than a square cushion of similar weight.
  • Soft, snag-free corners – rounded corners resist chipping, and diamond rates 10 on the Mohs scale.
  • Real diamond, accessible price – lab grown diamonds are identical to mined diamonds in every physical way but cost less for the same size and quality.
  • Responsibly grown – created without mining. Ask us about IGI certification for your center stone.

Metal, carat and setting options

Every design can be made in 925 sterling silver (also plated in yellow, white or rose gold), solid 10K, 14K or 18K gold in yellow, white or rose, or platinum. Your metal and carat choice determine the price, so you can tailor the ring to your budget. Not sure of her size? Our ring size guide walks you through it.

Rings ship free with insured tracked delivery in 7–15 days and 30-day returns. Prefer a squarer outline? Browse cushion cut lab grown diamond rings, or view elongated cushion moissanite rings.

Elongated Cushion Lab Grown Diamond Engagement Rings: Frequently Asked Questions

What is an elongated cushion cut diamond?

It is a cushion cut diamond with a rectangular rather than square outline, keeping the rounded corners and brilliant facets of a classic cushion. The extra length gives it a sleek, modern look and helps the ring flatter the hand. Ours are real lab grown diamonds, set in rings handcrafted to order.

Elongated cushion vs oval: which should I choose?

Both lengthen the finger. An oval has a fully curved outline and very even sparkle, while an elongated cushion keeps softly squared corners for a more vintage, structured look. If you love antique-style jewelry, the cushion often wins; if you want a smooth modern curve, choose an oval.

Is an elongated cushion durable for everyday wear?

Yes. Its rounded corners have no sharp points, and lab grown diamonds score 10 on the Mohs hardness scale, exactly the same as mined diamonds. With a secure prong setting, an elongated cushion ring is ready for daily wear at work, at home and on the go.

What metals are available for elongated cushion engagement rings?

Choose 925 sterling silver, also plated in yellow, white or rose gold, solid 10K, 14K or 18K gold in yellow, white or rose, or platinum. The price changes with your metal and carat choice, and every ring ships free with insured delivery in 7–15 days.