Choosing a Marquise Lab Diamond Engagement Ring

A marquise lab diamond has a long, curved outline that tapers to a point at each end. It creates a striking centre even in a modest solitaire setting, particularly if you like a ring with a strong line along the finger. Individual stones can be narrow or full, so compare their measurements and appearance rather than following a prescribed ratio.

Study the shape and setting

Check the alignment of both points and the symmetry of the curves. A marquise brilliant may show some darkness across the centre, making moving images helpful when comparing the actual stones. Both tips need appropriate protection from the setting; a V-shaped claw can be a practical design choice.

Compare spread rather than carat weight alone

The marquise outline can look generous across the finger, but its apparent size depends on actual length and width. Compare measurements and videos of the selected lab diamonds; two stones of the same weight may look noticeably different. Look for even curvature along both sides and ask how the points are supported in the setting. A wedding band may need to be considered early because of the centre's distinctive profile.

Look at the side profile if you would like a wedding band to sit nearby. A halo makes the outline more pronounced, while a fine solitaire allows the centre stone to carry the design. Explore the wider marquise engagement rings collection for comparison.

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.

Expert Lab-Grown Diamond Ring Advice

EXPERT, QUALIFIED ADVICE

Expert Lab-Grown Diamond Ring Advice

Compare lab-grown diamond cuts, clarity, colour and proportions with help from our jewellery consultants. Our team includes JET-qualified specialists and colleagues following the National Association of Jewellers' training pathway, offering practical guidance on grading reports and the settings that suit different diamond shapes.

Visit our Manchester or London showroom to compare designs, or arrange a virtual consultation.

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Marquise Lab Diamond Engagement Rings FAQs

What proportions matter most for marquise lab-grown diamond engagement rings?

A marquise-cut lab-grown diamond has two tapered points and an elegant, elongated outline. We'd compare the length-to-width ratio and actual millimetre size, as one marquise can look much more slender than another of the same carat weight. Trying different proportions on the hand can be especially helpful. The centre's placement and band width also influence how elongated the ring appears overall.

How should I assess the pointed ends of a marquise lab-grown diamond centre stone?

Both pointed ends of a marquise need careful attention in the setting. We'd examine the support around them and look at how evenly the curves of the stone are balanced. Some marquise diamonds show a darker bow-tie area across the middle; this varies and is best judged in a video of the individual stone. We prefer to assess that alongside the overall brightness rather than focus on one feature alone.

Which settings suit a marquise lab-grown diamond ring?

A marquise solitaire makes a lovely statement through shape rather than extra decoration. A halo gives it a wider outline, while a bezel introduces a defined metal border and covers more of the edge. We'd make tip protection a priority in any setting, then check the height and the fit with a wedding band. If the ring is to be worn every day, those practical details are worth getting right.