Elongated Cushion Cut Lab Diamond Engagement Rings
Elongated cushion lab-grown diamond engagement rings combine a longer, softly rectangular silhouette with the gentle corners of a cushion cut. Discover platinum and gold settings, from clean solitaires to contemporary bezels and diamond-accented designs. The length-to-width ratio and facet pattern influence how slender the diamond appears and how its sparkle moves across the face.
MARGOT
Elongated Cushion Lab Diamond 18k Yellow Gold Bezel Solitaire
FLORENCE
Elongated Cushion Lab Diamond Platinum Solitaire
FLORENCE
Elongated Cushion Lab Diamond 18k Yellow Gold Solitaire
PARIS
Elongated Cushion Lab Diamond 18k Yellow Gold Hidden Halo
LULU
Elongated Cushion Lab Diamond 18k Yellow Gold Petite Solitaire
VIOLA
Elongated Cushion Lab Diamond Platinum Shoulder Set
LULU
Elongated Cushion Lab Diamond Platinum Petite Solitaire
ZELLA
Elongated Cushion Lab Diamond Ring Inspired by Zendaya
MARGOT
Elongated Cushion Lab Diamond Platinum Bezel Solitaire
MARGOT
Elongated Cushion Lab Diamond 18k Rose Gold Bezel Solitaire
MARGOT
Elongated Cushion Lab Diamond 18k White Gold Bezel Solitaire
FLORENCE
Elongated Cushion Lab Diamond 18k Rose Gold Solitaire
FLORENCE
Elongated Cushion Lab Diamond 18k White Gold Solitaire
VIOLA
Elongated Cushion Lab Diamond 18k Rose Gold Shoulder Set
VIOLA
Elongated Cushion Lab Diamond 18k Yellow Gold Shoulder Set
VIOLA
Elongated Cushion Lab Diamond 18k White Gold Shoulder Set
DARLEY
Elongated Cushion Lab Diamond 18k White Gold Halo
DARLEY
Elongated Cushion Lab Diamond Platinum Halo
DARLEY
Elongated Cushion Lab Diamond 18k Rose Gold Halo
DARLEY
Elongated Cushion Lab Diamond 18k Yellow Gold Halo
PARIS
Elongated Cushion Lab Diamond Platinum Hidden Halo
PARIS
Elongated Cushion Lab Diamond 18k Rose Gold Hidden Halo
PARIS
Elongated Cushion Lab Diamond 18k White Gold Hidden Halo
Choosing an Elongated Cushion Lab Diamond
An elongated cushion lab diamond combines a longer centre-stone outline with softened corners. It is an attractive alternative to an oval if you prefer a more geometric edge without losing a gentle, rounded quality. Some elongated cushions look only slightly rectangular; others have an unmistakably long silhouette.
Review the cut in detail
Compare the measurements on the stone's grading report and look at its face-up shape. The facet arrangement can produce broad flashes or a finer sparkle pattern. Video is particularly useful for seeing whether the appearance is balanced across the whole stone. A classic four-claw solitaire keeps the outline prominent; a halo can broaden it further.
Set the elongated cushion in proportion
A longer cushion can make a striking centre stone, but the band and gallery should support its shape rather than compete with it. Compare tapered shoulders with a consistent band width, and notice how each changes the impression on the hand. Check whether the cut retains brightness towards the ends and whether the rounded corners are framed evenly. A slightly fuller stone may appeal more than the most elongated option.
Notice how much of the metal shows at the corners, and check the side profile for wedding-ring fit. Compare with our standard cushion cut lab diamond engagement rings if you are undecided between a square and a more elongated centre.
2026 Award Nominations
Award Winning Jeweller
We’re proud to be recognised consistently by the UK jewellery industry’s leading awards programmes. In 2026, Lily Arkwright has been shortlisted for Branded Boutique of the Year at the Professional Jeweller Awards and Bridal Jewellery Retailer of the Year at the UK Jewellery Awards, reflecting our continued commitment to exceptional customer service, product innovation, and ethical craftsmanship.
These latest nominations build on previous industry recognition, including being shortlisted for Bridal Jewellery Retailer of the Year at the 2025 UK Jewellery Awards and Independent Retailer of the Year at the Professional Jeweller Awards 2025. We were also finalists for Retail Team of the Year at both the Retail Jeweller Awards and Professional Jeweller Awards in 2024, recognising the passion, expertise, and dedication of our team.
We’re honoured to be recognised for helping thousands of couples find the perfect engagement rings and wedding rings, with a strong focus on choice, transparency, and personalisation. As an award-winning jeweller, we remain committed to delivering exceptional service, exceptional craftsmanship, and responsibly sourced lab-grown diamonds, moissanite, and natural diamonds, ensuring every customer can find a ring that perfectly reflects their love story.
Elongated Cushion Cut Lab Diamond Engagement Rings FAQs
What proportions matter most for elongated cushion lab-grown diamond engagement rings?
An elongated cushion lab-grown diamond has a softly rectangular shape, with rounded corners that distinguish it from a radiant or emerald cut. We'd compare the length-to-width ratio rather than choosing by carat weight alone. Some elongated cushions look very slender; others retain a fuller, softer impression. Seeing the diamond on the hand is useful for working out which proportions feel right for you.
How can I compare the facet pattern of an elongated cushion lab-grown diamond centre stone?
The faceting of an elongated cushion is especially worth examining. Some stones show larger, more defined reflections, while others have a fine crushed-ice effect. We'd suggest viewing the individual diamond in motion and paying attention to its appearance across the entire surface, including any dark areas. A grading report doesn't capture that visual distinction, so we would use it alongside photographs or video rather than on its own.
Which settings suit an elongated cushion lab-grown diamond ring?
A narrow solitaire can make the elongated cushion's shape beautifully prominent, while a halo adds detail around its softened rectangle. A bezel creates a stronger geometric frame. We'd check how much of the diamond's edge is visible and whether the basket sits high enough for the wedding band you have in mind. These small design decisions can make the finished ring feel quite different.
Need help choosing your jewellery?
Our jewellery specialists would be delighted to help you compare designs at our London or Manchester showrooms, or in a virtual consultation.