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NEXT DAY DELIVERY
Lab Diamond Side Stone Engagement Ring 0.25ct H/Si in 925 Silver
£189£225
Silver (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Lab Diamond Engagement Ring With Shoulders 0.25ct H/Si in 925 Silver
£189£239
Silver (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Lab Diamond Side Stone Engagement Ring 0.25ct H/Si in 9K White Gold
£419£645
From £14/mo
9K White Gold (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Naomi Lab Diamond Engagement Ring 0.15ct H/Si in 925 Silver
£139£155
Silver (selected) +1
Diamond Diamond 0.15ct H/SI (Lab Grown) (selected) Diamond Diamond
NEXT DAY DELIVERY
Lab Diamond Engagement Ring With Shoulders 0.25ct H/Si in 18K Gold Vermeil
£189£249
18K Gold Vermeil (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Lab Diamond Side Stone Engagement Ring 0.25ct H/Si in 18K Gold Vermeil
£189£235
18K Gold Vermeil (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Masami Diamond Engagement Ring 0.20ct Pave Set in 9K White Gold
£669£1,065
From £22/mo
9K White Gold (selected)
Diamond Diamond 0.20ct PREMIUMQUALITY (Natural) (selected)
NEXT DAY DELIVERY
1 Carat Lab Diamond Cluster Solitaire Ring H/Si in 9K White Gold
£749£1,249
From £25/mo
9K White Gold (selected)
Diamond Diamond Diamond Diamond 1.00ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Naomi Lab Diamond Engagement Ring 0.25ct H/Si in 925 Silver
£189£225
Silver (selected) +1
Diamond Diamond Diamond 0.25ct H/SI (Lab Grown) (selected) Diamond
NEXT DAY DELIVERY
Naomi Lab Diamond Engagement Ring 0.50ct H/Si in 925 Silver
£269£339
Silver (selected) +1
Diamond Diamond Diamond Diamond 0.50ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Lab Diamond Engagement Ring With Shoulders 0.25ct H/Si - 9K White Gold
£499£775
From £17/mo
9K White Gold (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
0.25ct Lab Diamond Cluster Solitaire Ring H/Si in 925 Silver
£189£235
Silver (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Ella Halo Lab Diamond Engagement Ring 0.55ct in 9K White Gold
£619£989
From £21/mo
Diamond Diamond 0.55ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Masami Pear Shaped Pave Diamond Engagement Ring 0.15ct 9K White Gold
£749£1,199
From £25/mo
9K White Gold (selected)
Diamond Diamond 0.15ct PREMIUMQUALITY (Natural) (selected)
NEXT DAY DELIVERY
0.25ct Lab Diamond Cluster Solitaire Ring H/Si in 18K Gold Vermeil
£189£249
18K Gold Vermeil (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Sale
Masami Diamond Halo Engagement Ring 0.25ct Pave Set in 9K White Gold
£535£979
From £18/mo
Diamond Diamond 0.25ct PREMIUMQUALITY (Natural) (selected)
NEXT DAY DELIVERY
Masami Pear Shaped Pave Lab Diamond Engagement Ring 0.15ct 925 Sterling Silver
£209£279
Silver (selected)
Diamond Diamond 0.15ct PREMIUMQUALITY (Lab Grown) (selected)
NEXT DAY DELIVERY
Naomi Lab Diamond Engagement Ring 0.15ct H/Si in 18K Gold Vermeil
£139£155
18K Gold Vermeil (selected) +1
Diamond Diamond Diamond 0.15ct H/SI (Lab Grown) (selected) Diamond
NEXT DAY DELIVERY
1 Carat Diamond Engagement Ring Grace Lab F/VS1 IGI Certified Platinum
£1,649£2,749
From £55/mo
Platinum (selected)
Diamond Diamond 1.00ct F/VS1 (Lab Grown) (selected) Diamond Diamond +11
NEXT DAY DELIVERY
Lab Diamond Side Stone Engagement Ring 0.25ct H/Si in 9K Gold
£419£645
From £14/mo
9K Yellow Gold (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Evoke 3 Stone Round Cut Lab Diamond Ring 0.50ct in 925 Silver
£299£389
Silver (selected) +1
Diamond Diamond 0.50ct F/VS (Lab Grown) (selected)
NEXT DAY DELIVERY
Naomi Lab Diamond Engagement Ring 0.50ct H/Si in 18K Gold Vermeil
£269£339
18K Gold Vermeil (selected) +1
Diamond Diamond Diamond Diamond 0.50ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
1 Carat Lab Diamond Cluster Solitaire Ring H/Si in 9K Gold
£749£1,249
From £25/mo
9K Yellow Gold (selected)
Diamond Diamond Diamond 1.00ct H/SI (Lab Grown) (selected) Diamond
NEXT DAY DELIVERY
Naomi Lab Diamond Engagement Ring 0.33ct H/Si 9K White Gold
£649£1,035
From £22/mo
9K White Gold (selected)
Diamond Diamond Diamond Diamond 0.33ct H/SI (Lab Grown) (selected) +2
Lab Diamond Side Stone Engagement Ring 0.25ct H/Si in 925 Silver

Round Cut Diamond Engagement Rings

A round diamond engagement ring is the ultimate classic. Known as the round brilliant cut, it features 58 precisely angled facets designed to maximise fire, brilliance, and scintillation - a timeless cut that remains the most popular choice for its ability to capture and reflect light from every angle. Our collection offers both diamond and gemstone settings, from vivid sapphires to deep emeralds, so you can find the ring that best reflects your love story.

The range spans elegant solitaires that let the diamond speak for itself, through to halo and side-stone designs that add depth and presence. Each round brilliant cut engagement ring is consciously crafted from recycled precious metals, with bands available in yellow gold, white gold, silver, and platinum. Our natural diamonds are ethically sourced in line with the UN-backed Kimberley Process, and our sustainably created lab-grown diamonds are chemically and visually identical, offering the same brilliance, beauty, and quality. Every gemstone in the collection is held to the same ethical standard.

Browse the collection and find the round engagement ring that reflects both the brilliance of the stone and the promise behind it.

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FAQs

Yes, we offer returns on engagement rings within our standard return period. This gives you peace of mind if the ring isn’t quite right. For full details, please see our returns policy (https://www.thediamondstore.co.uk/policies/refund-policy) or contact our customer service team (https://www.thediamondstore.co.uk/pages/contact-us).

The best metal depends on your style and lifestyle. Platinum engagement rings are durable and naturally white, making them ideal for everyday wear. 18K white gold offers a bright, modern look, while 18K yellow gold provides timeless warmth. All of our metals are recycled and chosen for both beauty and strength.

Don’t worry - it’s very common not to know your partner’s size when planning a surprise proposal. You can secretly measure a ring they already wear or ask a close friend or family member for help. Many of our engagement rings can also be resized later, and we allow you to take advantage of our generous return and exchange policy, too.

Yes, many of our engagement ring designs have matching wed-fit wedding bands available. These are crafted to sit perfectly alongside your engagement ring, creating a seamless bridal set. Our collection includes plain, pavé-set, and shaped bands to suit your chosen design.

Every engagement ring over a certain carat weight comes with a certified diamond, graded for the Four Cs – cut, colour, clarity, and carat weight. We also provide IGI or GIA certification for many designs, giving you full assurance of quality and authenticity.

In many cases, yes. Most classic engagement ring designs can be resized, though certain eternity bands or intricate styles may not allow it.

When you return your ring to us, if resizing isn’t possible, we’ll issue a replacement ring in your desired size instead. This is the best approach for the majority of orders.

If you would prefer your original ring to be resized, usually for sentimental reasons, please let our Customer Service team know when you get in touch. We’ll do everything we can to see if this can be arranged and will keep you informed throughout the process.

We don’t currently offer bespoke or custom-made rings. However, our collection includes a wide variety of engagement, eternity, and wedding rings in different styles, metals, and precious stone shapes and colours — giving you plenty of choice to find a design that feels personal and unique to your story.

Delivery times depend on the design and sometimes size of the ring. Many of our diamond rings in standard sizes are available for fast or even next-day delivery. Estimated delivery times are available on the product pages, but you can always reach out to our customer services if you’d like to know the lead time on a specific item.

Yes, every ring comes in a luxury presentation box, perfect for gifting or marking life’s special moments.

We offer both lab-grown and ethically sourced natural mined diamonds, so you can choose the option that best suits your budget and values. All natural diamonds are sourced in line with the Kimberley Process to ensure they’re conflict free, and all our stones are set in recycled precious metals.