The short answer: people choose larger lab grown diamonds because the same budget can often buy a bigger or higher quality stone, and many buyers value that freedom. The right choice depends on what matters most to you, size, quality or origin.
Lab grown diamonds are generally priced lower than natural diamonds of a similar size and grade. That does not make them lesser stones. It simply changes what a budget can do, and it is one of the most common reasons couples tell us they chose lab grown.
The common reasons
- More size: a bigger centre stone for the same spend.
- More quality: a higher colour or clarity than a natural stone at the same budget.
- Design freedom: room in the budget for a more detailed setting, a hidden halo or side stones.
- Comfort with origin: some buyers like knowing a stone was made in a laboratory.
Choosing size wisely
A larger stone is not automatically a better ring. Size should suit the finger, the setting and your daily life. A very large stone needs a secure, well designed setting, and it should still feel comfortable on the hand. See rings for small and large hands.
Carat weight and how big it looks
Carat is a weight, not a size. A stone of the same weight can look larger or smaller depending on its shape and cut. Elongated shapes such as oval, pear and marquise spread across the finger and often look larger for their weight than a round. A shallow cut can look wider but may lose some brilliance. We can compare the measurements of the actual stones, not only the weights. See which diamond shape looks biggest.
What stays the same
Quality still matters. We look at cut, colour and clarity, not only carat weight, and we check the report with you. A well cut stone of modest size can look more brilliant than a large, poorly cut one. See what a lab grown diamond report must show.
Living with a larger stone
A bigger stone sits higher or wider on the hand, so it is more likely to knock against doors, desks and bags, and it can catch on knitwear. A slightly lower setting, rounded claws or a protective bezel can make a large stone easier to live with. It is also worth thinking about how the ring will sit beside a wedding band. See wedding bands for a ring with a large stone.
The trade offs
- Lab grown diamonds are valued differently from natural diamonds in resale and trade.
- Some buyers prefer the rarity of natural stones.
- The choice is personal, and there is no wrong answer.
See lab grown diamond resale value: an honest answer.
Spending the difference
Some people use the saving to upgrade the metal, add a gemstone accent or commission a matching wedding band. Because every ring is bespoke, we can help you plan how to use the budget.
How to choose
- Decide what matters most: size, quality or origin.
- Set a budget and see what each type can offer.
- Look at real stones on video.
- Choose the setting that supports the stone.
Browse lab grown colourless diamonds and compare with diamonds. See also choosing between a 1.5 carat lab grown and a 1 carat natural. Nothing is made until you approve the design in writing, and our standard making time is 5 to 6 weeks, which can vary with your location and how busy we are. Pieces start from £600.
Frequently asked questions
Is a bigger lab grown diamond worth it? If size matters to you and the cut is good, many people find it is.
Do lab grown diamonds hold value? They are valued differently from natural diamonds, so we suggest choosing for enjoyment rather than investment.
Can I mix a lab grown centre with natural side stones? Yes, if you wish, and we describe each stone clearly.
Is a large stone harder to wear? It can catch more, so a lower or protective setting helps.
Is there a limit on size? Availability varies, so tell us the size you have in mind.