0.9 Carat Diamond Engagement Rings

Discover your 0.9 carat engagement ring - with a curated selection of striking and scintillating diamonds to suit your preferred design.

Most rings shown with 1ct 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 0.9 Carat Diamond Rings

A 0.9 carat diamond ring is a popular choice, for a sizeable diamond that looks very close to a full carat, but costs less. Diamonds are priced ‘by the carat’, meaning prices jump significantly at weights like 1 carat - yet there is only a little visual difference in size with a 0.9ct engagement ring.

A 0.9 carat diamond weighs the equivalent of 180mg, and is just shy of a full carat by 0.1 carat. A round 0.9 carat diamond measures around 6.2mm in length; or more like 7.8mm for elongated shapes like oval diamonds.

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 0.9ct Diamond Rings

What is a 0.9 carat engagement ring?

A 0.9 carat engagement ring features a main diamond that is just 0.1ct under a full carat - this means it measures around 6.2mm in length, which is just 0.2mm smaller than a typical 1 carat engagement ring. 0.9ct is a popular choice, as it can more or less give the look of a 1ct ring, with a lower price tag.

Is a 0.9 carat diamond ring a good idea?

0.9 carat diamond engagement rings are a great choice. Many couples aim for one full carat, but this can cost considerably more than a 0.9ct engagement ring despite looking on very slightly bigger. In fact, most people can barely tell a 0.90ct and 1ct diamond apart, if at all.

Can you tell the difference between a 1 carat and 0.9 carat diamond ring?

The 0.1ct difference between 0.9ct and 1ct is minimal - typically a difference of around 0.2mm in the diamond’s length. For most people, the difference between a 1 carat and a 0.9 carat diamond ring appears minimal and not noticeable.

How much does a 0.9ct engagement ring cost?

0.90ct diamond rings start at around £2,275.

A good quality 0.9 carat diamond typically costs £1,575 if it’s a loose lab grown diamond, or £6,500 if it's a loose natural diamond. The total price of a 0.9 carat diamond ring will have the additional cost of the ring setting itself, starting at £700.

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

What size is a 0.9 carat diamond in mm?

The length of a 0.9 carat diamond starts at around 6.mm for a round diamond - or more like 7.6mm for elongated diamond shapes like ovals. For this reason, 0.9 carat oval diamond rings are really popular, because they can look like 1 carat or even bigger!

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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