0.5 Carat Diamond Engagement Rings

A 0.5 carat diamond ring is a beautiful option for a dainty yet dazzling ring, and is friendly for tighter budgets. Find your 0.5 carat engagement ring below, and complete with the diamond of your choice.

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 Half Carat Diamond Rings

A 0.5ct diamond ring weighs 100mg, making it among the smaller options for a diamond engagement ring, yet it is a beautiful option for people with refined and minimalist taste. The size of a round half carat diamond ring is around 5.25mm: not too small, not too big - a perfectly dainty ring for people that like to keep things understated and simple.

The 0.5 carat diamond price will be considerably less than bigger carat weights, because diamond price increases exponentially with weight. If you’re working to a tight budget, consider a 0.5ct diamond ring - you could find even more savings with a lab diamond.

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 0.5ct Diamond Rings

How much does a half carat diamond ring cost?

A 0.5 carat diamond ring can cost upwards of around £1,625.

A good quality lab grown 0.50ct diamond typically costs £925, and a good quality 0.50ct natural diamond costs upward of £1,800. You will then pay for the ring setting itself, which starts at £700 for a good quality platinum or 18K gold solitaire ring.

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

Is a 0.5ct diamond ring a good size?

A 0.5ct diamond ring is a good size: it isn’t huge, but it isn’t microscopic either. The smallest diamond you can choose for an engagement ring is 0.30ct, so this is a good 0.20ct bigger. Lots of couples love the dainty, minimalist look of a 0.50ct diamond ring. Some professionals find they can’t wear a big engagement ring to work, like doctors, nurses and vets, so a half carat diamond ring can be a great option for them.

What does 0.5 carat mean?

0.5 carat is a measurement of a diamond’s weight, that equates to half of a full carat. One full carat weighs 200mg, so a 0.5 carat diamond weighs half that, at 100mg. A round shape 0.5 carat diamond typically measures a little over 5mm in diameter.

Is a 0.5 carat engagement ring too small?

A 0.5 carat engagement ring is not too small! Only diamonds below 0.30ct are considered too small for classic engagement rings. A 0.5 carat diamond can be the perfect size for lots of couples and their budgets, offering great, fiery sparkle.

Are half carat diamond rings popular?

Half carat diamond rings used to be one of the most popular carat weights to opt for. This was when ring buyers only had natural diamonds to choose from - now that lab diamonds are available, typically for prices between 50% to 80% less, higher carat weights have become more popular. Couples that have the budget for a 0.5ct natural diamond could now find they can afford a lab diamond closer to a 1 carat diamond ring - that’s twice bigger!

How big is a 0.5ct diamond in mm?

A round half carat diamond measures around 5.25mm in length. This can vary very slightly, depending on how the diamond has been cut. Elongated 0.5ct diamond shapes will look a little longer - like 6.45mm for a 0.5ct oval.

Customer Support

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

Need help choosing the perfect ring?

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