Choosing elongated cushion cut lab diamond engagement rings

Assess the elongated cushion diamond

Elongated cushions can differ in how rectangular they appear, how curved their edges are and how their facets distribute light. Compare photographs and video of the actual stone alongside the length and width; the cut name and carat weight cannot describe all these differences.

Look at the complete mounting

Look at where the claws meet the rounded corners and how the basket supports the length of the centre. A hidden halo adds detail from the side, while a visible halo changes the top-view width. Check the band’s proportions and wedding-ring clearance.

Compare the selected laboratory information

Read the report issued for your chosen lab grown diamond, including its date, dimensions and relevant comments. Report services and terminology differ. Compare current complete-ring prices with the same stone and mounting specification, and ask for viewing information if appearance is not clear.

Designs to compare

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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.

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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.

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