"How much should I spend?" is one of the first questions people ask when they start looking for an engagement ring. With lab-grown diamonds, the answer is often more approachable than people expect. In this guide we share real prices from our own collection, so you can see exactly what a 1ct lab-grown diamond ring costs at John Stewart Jewellers, and what makes one ring cost more than another.
Prices below are taken from our website at the time of writing and may change. Always check the product page for the latest price.
Our 1ct lab-grown diamond rings
A one-carat diamond is a classic choice: big enough to make a statement, yet elegant enough to wear every day. Here are some of our 1ct styles:
- Classic 1ct Hidden-Accent Solitaire: £950. A brilliant 1ct lab-grown diamond in 9ct gold, elevated to catch the light.
- 9ct 1ct Round Lab Diamond Ring: £950. A 1ct round brilliant-cut lab-grown diamond at its heart.
Going a little larger: 1.2ct to 1.5ct
If you'd like a little more presence, rings between 1.2ct and 1.5ct are a popular sweet spot:
- 9ct 1.2ct Oval Lab Diamond: £925.
- The Radiant 1.2ct Solitaire: £950.
- The Princess Lumière Ring, 1.2ct: £950.
- 9ct 1.2ct Oval Lab Diamond with Hidden Halo: £1,050.
- 9ct Ring with 1.2ct Pear Lab Diamond: £1,050.
- 9ct Yellow Gold 1.51ct Oval Lab Diamond Ring: £1,195.
- Classic 1.5ct Hidden-Accent Solitaire: £1,200.
Making a statement: 2ct
- Classic 2ct Hidden-Accent Solitaire: £1,450.
- 2ct Marquise Engagement Ring: £1,775.
What affects the price of a lab-grown diamond ring?
Two rings with the same carat weight can be priced differently. These are the main reasons:
1. Carat weight
Generally, the heavier the diamond, the higher the price. You can see this in our Classic Hidden-Accent Solitaire range, which goes from £950 for 1ct to £1,200 for 1.5ct and £1,450 for 2ct.
2. Shape and cut
Round brilliants, ovals, pears, marquise, emerald and radiant cuts each have their own character. The quality of the cut also has a major effect on how much a diamond sparkles.
3. Colour and clarity
Diamonds are graded on how colourless they are and how free they are from tiny inclusions. Higher grades usually cost more.
4. The setting
A simple solitaire uses less metal and fewer stones than a halo, trilogy or toi et moi design. Hidden halos, pavé bands and side stones all add sparkle and craftsmanship, which is reflected in the price.
5. The metal
Most of our engagement rings are crafted in 9ct gold, which is durable and great value. Some designs are also offered in 18ct gold or platinum, which costs more. For example, our Aries Band is £295 in 9ct gold and £595 in 18ct gold or platinum. Read more in our guide, 9ct vs 18ct Gold vs Platinum.
Don't forget the wedding band
If you're planning ahead, it's worth thinking about a matching wedding band too. Many of our bands are made to order, with production times of up to six weeks, and our in-store designers can 3D scan your engagement ring to craft a perfectly matching band.
Need help choosing?
The best way to understand what you're paying for is to see the rings side by side. Visit us in Clydebank, Ayr or Irvine, book an appointment, or email cad@johnstewartjewellers.com. And if you have a specific design in mind, our CAD design service can create it for you.
