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NEXT DAY DELIVERY
Princess Cut Lab Diamond Engagement Ring 0.25ct H/Si in 925 Silver
£219£275
Silver (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Princess Cut Lab Diamond Engagement Ring 0.25ct H/Si in 9K White Gold
£469£729
From £16/mo
9K White Gold (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Princess Cut Lab Diamond Engagement Ring 0.50ct H/Si in 9K White Gold
£679£1,115
From £23/mo
9K White Gold (selected)
Diamond Diamond 0.50ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Katerina Lab Princess Diamond Engagement Ring Platinum 1.55ct F/VS1
£1,879£3,129
From £63/mo
Platinum (selected)
Diamond Diamond 1.55ct F/VS1 (Lab Grown) (selected) Diamond Diamond +5
NEXT DAY DELIVERY
Katerina Lab Princess Diamond Engagement Ring 18KW Gold 0.85ct F/VS1
£1,369£2,279
From £46/mo
18K White Gold (selected)
Diamond Diamond Diamond Diamond 0.85ct F/VS1 (Lab Grown) (selected) +6
NEXT DAY DELIVERY
Katerina Lab Princess Diamond Engagement Ring Platinum 0.85ct F/VS1
£1,379£2,375
From £46/mo
Platinum (selected)
Diamond Diamond Diamond Diamond 0.85ct F/VS1 (Lab Grown) (selected) +5
NEXT DAY DELIVERY
Princess Cut Lab Diamond Engagement Ring 0.25ct H/Si in 18K Gold Vermeil
£229£295
18K Gold Vermeil (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
2.10ct Katerina Lab Princess Diamond Engagement Ring Platinum F/VS1
£2,099£3,495
From £70/mo
Platinum (selected)
Diamond Diamond Diamond 2.10ct F/VS1 (Lab Grown) (selected) Diamond +5
NEXT DAY DELIVERY
Naomi Princess Cut Lab Diamond Engagement Ring 0.50ct H/SI in 925 Silver
£299£429
Silver (selected) +1
Diamond Diamond Diamond 0.50ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Princess Cut Lab Diamond Engagement Ring 0.25ct H/Si in 9K Gold
£469£729
From £16/mo
9K Yellow Gold (selected) +1
Diamond Diamond 0.25ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Princess Cut Lab Diamond Engagement Ring 0.50ct H/Si in 9K Gold
£679£1,115
From £23/mo
9K Yellow Gold (selected)
Diamond Diamond 0.50ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Katerina Lab Princess Diamond Engagement Ring 18KW Gold 1.55ct F/VS1
£1,879£3,129
From £63/mo
18K White Gold (selected)
Diamond Diamond 1.55ct F/VS1 (Lab Grown) (selected) Diamond Diamond +6
NEXT DAY DELIVERY
Katerina 3.45ct Lab Diamond Princess Cut Engagement Ring in Platinum G/VS1
£2,899£4,829
From £97/mo
Platinum (selected)
Diamond Diamond Diamond Diamond 3.45ct G/VS1 (Lab Grown) (selected) +5
NEXT DAY DELIVERY
2.10ct Katerina Lab Princess Diamond Engagement Ring 18KW Gold F/VS1
£2,099£3,495
From £70/mo
18K White Gold (selected)
Diamond Diamond Diamond 2.10ct F/VS1 (Lab Grown) (selected) Diamond +6
NEXT DAY DELIVERY
Roxy Lab Diamond Engagement Side Stone Ring in Platinum 0.98CT F/VS1
£1,419£2,365
From £47/mo
Platinum (selected)
Diamond Diamond 0.98ct F/VS1 (Lab Grown) (selected)
NEXT DAY DELIVERY
Roxy Lab Diamond Engagement Side Stone Ring in 18KW Gold 0.98CT F/VS1
£1,399£2,329
From £47/mo
18K White Gold (selected)
Diamond Diamond 0.98ct F/VS1 (Lab Grown) (selected)
NEXT DAY DELIVERY
Solstice Princess Cut 0.80ct Lab Diamond Engagement Ring F/VS in 9k White Gold
£839£1,355
From £28/mo
9K White Gold (selected)
Diamond Diamond 0.80ct F/VS (Lab Grown) (selected)
NEXT DAY DELIVERY
Naomi Princess Cut Lab Diamond Engagement Ring 1.00ct H/SI in 9k White Gold
£1,099£1,835
From £37/mo
9K White Gold (selected)
Diamond Diamond 1.00ct H/SI (Lab Grown) (selected) Diamond
NEXT DAY DELIVERY
Naomi Princess Cut Lab Diamond Engagement Ring 0.33ct H/SI in 925 Silver
£249£345
Silver (selected)
Diamond Diamond 0.33ct H/SI (Lab Grown) (selected) Diamond
NEXT DAY DELIVERY
Katerina Lab Princess Diamond Engagement Ring 18K Gold 0.85ct F/VS1
£1,369£2,279
From £46/mo
18K Yellow Gold (selected)
Diamond Diamond Diamond Diamond 0.85ct F/VS1 (Lab Grown) (selected) +4
NEXT DAY DELIVERY
Sale
Roxy Diamond Engagement Side Stone Ring in 18KW Gold 0.98CT G/SI2
£1,699£3,199
From £57/mo
Diamond Diamond 0.98ct H/SI (Natural) (selected)
NEXT DAY DELIVERY
Naomi Princess Cut Lab Diamond Engagement Ring 0.50ct H/SI in 18k Gold Vermeil
£299£429
18K Gold Vermeil (selected) +1
Diamond Diamond Diamond 0.50ct H/SI (Lab Grown) (selected)
NEXT DAY DELIVERY
Katerina 3.45ct Lab Diamond Princess Cut Engagement Ring in 18K White Gold G/VS1
£2,949£4,919
From £98/mo
18K White Gold (selected)
Diamond Diamond Diamond Diamond 3.45ct G/VS1 (Lab Grown) (selected) +6
NEXT DAY DELIVERY
2.60ct Katerina Lab Princess Diamond Engagement Ring Platinum F/VS1
£2,549£4,249
From £85/mo
Platinum (selected)
Diamond Diamond Diamond Diamond 2.60ct F/VS1 (Lab Grown) (selected) +5
Princess Cut Lab Diamond Engagement Ring 0.25ct H/Si in 925 Silver

Silver, Platinum, and Gold Princess Cut Engagement Rings

Its square shape is as striking in a minimalist solitaire as it is in a more elaborate setting. Each ring in our collection is consciously crafted from recycled precious metals, with bands available in platinum, silver, and 9k or 18k gold. You can choose between conflict-free mined diamonds or lab-grown diamonds that are chemically and visually identical, offering the same beauty and enduring quality.

From the timeless solitaire - where a single princess-cut diamond sits in a classic four-prong setting - to pavé bands that add extra sparkle, our designs highlight the stone’s radiant shape. For those who love the richness of yellow gold, our gold princess cut engagement rings offer a striking blend of warmth and brilliance.

Shop our range to find your princess cut engagement ring - one that makes you feel like royalty.

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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.