1.25 Carat Diamond Engagement Rings

Create the 1.25 carat diamond engagement ring you’ve dreamed of, with your selection of natural or lab diamonds and the perfect ring design to enhance its fiery sparkle.

Most rings shown with 1 ct diamond

We’re here to help

We get it, you’ve never done this before.

That’s why we have diamond and design experts on hand, who are here to guide you through every step - from understanding what carat, color, cut and clarity mean, to designing the perfect ring.

About 1.25 ct diamond rings

A 1.25 carat diamond ring is now the average engagement ring carat weight in the UK. While the average was until very recently much lower, the emergence of lab grown diamonds has helped couples to achieved a higher carat weight for their budget.

Surpassing 1 carat by 0.25 carats, a 1.25 carat diamond ring is sizeable and impressive - whilst still demure and suitable for everyday wear. A round 1.25 carat diamond is roughly 6.8mm in length, and weighs 250mg. This is a really popular carat weight for an engagement ring!

Ring Styles

Modern classics

You want your ring design to be timeless, and we get that. Our collection features rings that transcend trends, look great from every angle and are made to last a lifetime.

Try filtering your search by our core engagement ring styles:

Solitaire engagement rings
Diamond band engagement rings
Halo engagement ring
Trilogy engagement rings

Our Diamonds

Ethically sourced & certified

The modern way to buy loose diamonds for your engagement ring, with real 360 videos and advanced filtering. Whether you're looking for a lab-created or natural centre stone, find the perfect loose diamond from our responsibly sourced collection of certified diamonds.

Exquisite Craftsmanship

Made for you

Each Queensmith engagement ring is crafted to order, made just for you and your partner. We have an in-house workshop and production team that meticulously crafts your ring and finesses every detail until it passes our final quality control check. Our quality and finish is a cut above the rest.

As part of our commitment to you, we offer a Lifetime Care Package including manufacturer's warranty, free servicing, free resizing and free cleaning, fully inclusive with every ring made by us.

We've Got You Covered

In London
Certified Diamonds
Free UK
Free Resizing
40 Days

Frequently Asked Questions

Learn About 1.25 ct Diamond Rings

How much does a 1.25 carat diamond engagement ring cost?

The cost of a 1.25 carat engagement ring starts at around £2,700, but prices will vary depending on whether you choose a natural or lab diamond, the quality of the diamond you choose, and the complexity of your preferred ring design.

A loose 1.25 carat natural diamond will start at around £11,000 - whereas a loose 1.25 carat lab grown diamond will be a little over £2,000. In addition to this, you’ll pay a fee for the ring setting itself, starting at £700 for a simple solitaire ring.

You should be aware that diamond prices fluctuate, and this should be used as a guide price accurate at the time of writing.

Is a 1.25 carat diamond ring a good size?

1.25 ct is the perfect size for an engagement ring. It is around the average size of an engagement ring in the UK, and offers a good amount of finger coverage whilst still looking demure and being a very practical size for everyday wear. Most people would be extremely pleased to receive a 1.25 carat diamond ring!

How big is a 1.25 carat diamond engagement ring?

A round diamond weighing 1.25 ct will measure around 6.8mm in diameter. This will vary slightly from diamond to diamond, depending on how well the diamond has been cut. Other shapes including elongated diamonds like pear, marquise and ovals can look considerably larger due to a increased spread of carat weight - a 1.25ct oval diamond typically measures 8mm in length.

Is a 1.25 ct diamond ring popular?

Yes, 1.25 ct is currently the most popular diamond carat weight for an engagement ring in the UK. This has increased significantly over the past few years, thanks to the emergence of lab diamonds. Lab diamonds offer a lower cost carat-for-carat than natural diamonds, meaning engagement ring buyers can achieve a high carat weight for their budget.

What’s the difference between a 1 and 1.25 carat diamond?

There is a noticeable difference in size between a 1 carat and 1.25 carat diamond, with 0.25 ct between them. With a typical round diamond, this will measure approximately just 0.4mm, but most people will be able to tell a slight difference between the two diamonds.

Customer Support

Do you have additional questions? No problem, let us help you through the process

Need help choosing the perfect ring?

Get in touch with our experts - we’re on hand to help.

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