Is a Lab-Grown Diamond Worth It? A Straight Answer for UK Buyers

Short answer: yes, if you are buying a diamond to wear. A lab-grown diamond gives you a larger, cleaner, whiter stone for your money than a mined one, with the same hardness and sparkle. It is not an investment, and it has little resale value. Here is the detail, written for UK buyers.

What you are actually buying

A lab-grown diamond is a diamond. It is the same carbon crystal as a mined diamond, with the same hardness (10 on the Mohs scale, the top of the scale), the same way of bending light, and the same durability. It is grown over a few weeks in a laboratory instead of forming underground. It will not go cloudy, scratch in normal wear or fade.

What separates it from a mined diamond is its origin, and in the UK that has to be stated plainly when it is sold. Every stone we set is described as lab-grown, on the product page, the receipt and any grading report.

Why it costs so much less

Mined diamonds are scarce and expensive to bring out of the ground. Lab-grown diamonds can be grown to order, and growers keep getting faster and more efficient. The result is that a lab-grown diamond costs a fraction of a mined one of the same size and quality, and prices are still falling: wholesale prices for lab-grown diamonds fell 26% year on year in 2025, according to Edahn Golan's Lab Diamond Wholesale Price List (reported by Niche Magazine, January 2026).

For a buyer that is good news on the day you buy. It is also the reason for the next point.

Resale value: be realistic

Because new lab-grown diamonds keep getting cheaper, a second-hand one is worth little. If you might want to sell the piece later, or you are buying it to hold its value, a lab-grown diamond is the wrong choice. The precious metal keeps its own value: solid 14kt gold is 58.5% pure gold and 18kt is 75%, whatever the stone. Buy a lab-grown diamond because you want to wear it.

Quality: what to check

• Colour and clarity. Ask for the grade. Ours are D–F colour (the top of the colour scale) and VS1 clarity or better, so inclusions are not visible to the eye.
• A grading report for bigger stones. A single stone of 1.00ct or more is worth having independently graded. Every piece we make with a centre stone of 1.00ct or more includes an IGI grading report.
• The metal. A good stone deserves a good setting. Look for a UK hallmark on gold over 1 gram: 585 for 14ct, 750 for 18ct. 9ct (375) is only 37.5% gold. See our 14ct vs 9ct guide.

Insurance

Insure lab-grown diamond jewellery like any other jewellery. Policies usually pay to replace a lost piece with an equivalent one, so keep your receipt and, for a 1.00ct or larger centre stone, the grading report. Tell your insurer the diamond is lab-grown, so the cover matches what you own.

So, is it worth it?

• Worth it if you want the biggest, best-quality diamond your budget allows, for an engagement ring, earrings, a pendant or a tennis bracelet you will wear for years.
• Not worth it if you want an investment, or a stone whose value is in its rarity.

Quick answers

Are lab-grown diamonds fake?

No. A fake is a different material that only imitates a diamond. A lab-grown diamond is diamond, with the same hardness and brilliance as a mined one.

Can a jeweller tell it is lab-grown?

Not by eye or with a jeweller's loupe. It takes laboratory equipment. Graded lab-grown diamonds are normally laser-inscribed with their report number, and the report states that the stone is laboratory-grown.

Do lab-grown diamonds last?

Yes. They are as hard and as durable as mined diamonds, and they keep their sparkle for life with ordinary cleaning.

Is a lab-grown diamond good for an engagement ring?

Yes. It is hard enough for daily wear, and the saving can go towards a bigger centre stone or a better metal. See our lab-grown diamond engagement rings.

Before you buy, see our UK buyer's guide to lab-grown diamonds for what to check and what a fair price looks like.