3.5 Carat Diamond Engagement Rings

Create your perfect 3.5 carat diamond ring. Discover sublime and style-enduring ring designs, and complete with your choice of exquisite natural or lab grown diamond.

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 3.5 ct diamond rings

A 3.5 ct diamond ring is considered a large and impressive piece of jewellery, and could be fairly costly depending on the quality of the diamond, whether it is natural or lab grown, and the complexity of the ring design. The price of a 3.5 ct diamond ring can range from several thousands to tens of thousands - largely depending on whether you opt for a natural diamond or lab diamond.

With a round 3.5 carat diamond measuring close to 10mm, this is one of the larger carat weights you can select for your engagement ring. This will offer extremely good finger coverage and so long as the gem is of great quality, will emit a mesmerising and exquisite sparkle!

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 3.5 ct Diamond Rings

What is the actual size of a 3.5 carat diamond ring?

A round diamond with a 3.5 ct weight will measure approximately 10mm in diameter, but this can vary depending on the cut of the diamond. Other shapes can appear a little larger or longer, like oval, marquise or pear diamonds.

It's also important to note that the size of the diamond isn't the only factor that determines the overall size of the ring. The setting and design of the ring can also impact its size and proportions. A 3.5 carat diamond ring can be designed to be a statement piece, with a large and prominent diamond and other detailing that draws attention, like a halo ring, or it can be designed to be more subtle and understated, like a solitaire ring.

Is a 3.5 carat diamond engagement ring big?

Yes, a 3.5 carat diamond engagement ring is considered a very large and impressive ring. A diamond of this size will certainly make a statement and is likely to be the centre of attention. The size of a 3.5 carat diamond engagement ring can vary depending on the cut and shape of the diamond as well as the design of the ring, but in general, it will be quite sizeable.

However, it's important to remember that the size of the diamond isn't the only factor that determines the beauty and value of an engagement ring. The quality of the diamond's cut, clarity, and colour, as well as the setting and design of the ring, all play a role in creating a beautiful and meaningful piece of jewellery.

Is there an obvious difference between a 3 carat and 3.5 carat diamond ring?

Yes, there is a fairly noticeable difference between a 3 carat and 3.5 carat diamond ring. If you hold the two side by side, you’ll notice a difference of one to two millimetres. This is small, but you’ll probably be able to tell which is the bigger diamond!

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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