Are lab grown diamonds worth it? For most people buying an engagement ring, yes, provided you buy one to wear rather than to sell. A lab-grown stone is a real diamond that costs far less than a natural one of the same size and grade. That makes it a good pick if you want a bigger or cleaner stone for your budget. A natural diamond suits you better if rarity, origin and a stronger (though still limited) resale value matter more to you than size.

The trouble is that every source pushes a side. Sellers of natural stones talk lab-grown diamonds down, sellers of lab-grown stones call them a bargain, and resale figures online range from "almost nothing" to "a third less than you paid". That makes a decision worth thousands of pounds feel like guesswork.

This article weighs the five factors that actually decide the question: price, quality, resale, ethics, and the cases where natural is the better call. We make bespoke rings in Hatton Garden with both kinds of diamond, so we have no reason to steer you one way. Read the verdict under each factor, then match it to your own priorities.

1. You get more diamond for your money

Yes, and price is the strongest reason. Retailers commonly put the saving at 50 to 75% less than a natural diamond with the same size and grades, and the gap has widened as production has grown.

What the evidence shows

Lab-grown diamonds skip the mine, the long supply chain and the scarcity premium. You pay for growing, cutting and setting the stone. The table shows what that means for an illustrative £5,000 natural 1 carat stone (G colour, VS2 clarity). The £5,000 is an assumed example, not a quote.

The same money buys either a smaller natural diamond or a noticeably better lab-grown one.

How to act on it

Decide before you shop where the saving goes. You can step up in carat weight, choose higher colour and clarity grades, or put the difference into a better setting and keep the rest. Put cut quality first, because cut drives sparkle more than an extra tenth of a carat.

For a sense of finished prices, our lab-grown engagement rings Windermere and Talia cost £2,450 each, and Camille costs £2,800.

Who it suits

Buyers who want visible size or top grades on a fixed budget. If you would rather own a smaller stone for its natural origin, the saving matters less to you.

2. It is a real diamond, but quality still varies

A lab-grown diamond is a real diamond, but not every lab-grown diamond is a good one. Each stone still needs checking on its own merits.

What the evidence shows

Lab-grown diamonds share the same carbon crystal structure, chemistry and hardness (10 on the Mohs scale) as mined stones. That is why they resist scratching and suit daily wear. They are not simulants such as cubic zirconia or moissanite, which are different materials with different hardness and sparkle.

Quality still varies because each crystal grows from its own seed. Stones made by HPHT can show a slight blue cast, and some CVD stones carry a brown or grey undertone. A colourless grade on paper does not always match what you see in the stone.

Real is settled. Whether a particular stone is good depends on its cut, grades and tint.

How to act on it

Use the same discipline you would use for a natural stone:

• Ask for a grading report from a recognised laboratory such as GIA or IGI, stating that the stone is laboratory-grown.
• Judge the cut first, then colour and clarity.
• View the stone in person or on a detailed video to spot any tint.
• Get a valuation certificate for insurance. We provide one with our rings.

Who it suits

Anyone who worries a lab-grown diamond is "fake", and anyone who will wear the ring every day. It suits you best if you can inspect the stone, or have a gemologist inspect it with you, before it is set.

3. Do not expect to resell it for much

No. Treat resale value as close to zero and you will not be disappointed. This is the real weak spot of lab-grown diamonds, and any seller who glosses over it is not being straight with you.

What the evidence shows

Natural diamonds come out of the ground in limited numbers. Lab-grown diamonds can be made in whatever quantity the market wants, and prices keep falling as more producers join in. A stone bought today is likely to cost less next year.

Published resale estimates vary widely, from roughly 30 to 60% below the purchase price for rings to almost nothing on buyer forums. Natural stones lose value too. A retail price includes the jeweller’s service, warranty and overheads, and a second-hand buyer will not pay for those. The difference is that a natural stone usually keeps a portion of its price, while a lab-grown one may keep very little.

Buy a lab-grown diamond to wear for decades, not to sell.

How to act on it

Budget as if the ring will never be sold. Insure it at replacement value and update the valuation every few years, because prices move. Our rings come with a valuation certificate for insurance, a lifetime manufacturing warranty and free resizing for life, which protect the ring itself even if they do not protect its resale price.

Who it suits

Couples who keep their rings long term and see them as heirlooms. If you want a ring as a store of value, neither type is a good fit. A natural stone simply loses a little less.

4. The ethical case is real but not simple

Partly. Lab-grown diamonds avoid mining and give you a traceable origin, but "lab-grown" does not automatically mean low impact.

What the evidence shows

The strongest point in their favour is no mine and a clear origin. The weak point is energy. HPHT growth uses a great deal of power, while CVD generally needs less. The result depends heavily on the electricity source, so a stone grown on renewable power is a different proposition from one grown on a fossil-fuel grid.

Published comparisons of energy and water use per carat vary between producers, so treat any single figure with caution. Natural diamonds are not automatically unethical either. Responsibly sourced stones with documented origin exist.

Ask for the energy source and the paperwork, not just the label.

How to act on it

Put these questions to any seller, whichever type you choose:

• Which growth method made this stone, HPHT or CVD?
• What energy powered it, and can you show that in writing?
• For a natural stone, where was it mined and how is that documented?

We state that all our diamonds are ethically sourced, and that our lab-grown diamonds are 100% conflict-free. You should still ask any jeweller, us included, to explain how.

Who it suits

Buyers who want to avoid mining and are willing to ask about energy use. If ethics is your top concern, a documented origin matters more than the lab versus mine label.

5. Natural diamonds still win for some buyers

Natural is the better choice if rarity, origin or tradition matter more to you than size and price. Neither type is universally better.

What the evidence shows

A natural diamond formed over billions of years and cannot be produced on demand. For some people that history is the whole point of the purchase. Natural stones also tend to keep a larger share of their value than lab-grown ones, though they still depreciate. Lab-grown stones win on price, size and grade. The table sets your priorities against the better pick.

If you cannot name a reason to pay the natural premium, the lab-grown stone is the better value.

How to act on it

Look at both types side by side before you commit. Our made-to-order rings cannot be returned, so settle the stone first. A complimentary consultation lets you compare natural and lab-grown stones with a gemologist, and we can build the ring around your budget. We lock quotes for 14 days, which gives you time to think it over.

Who it suits

Buyers who value rarity, origin and a little more resale value, and who accept a smaller or lower-grade stone for the same money. If that sounds like you, natural is worth the premium.

The short verdict

A lab-grown diamond is worth it if you want the most visible diamond for your money and you see the ring as something to wear, not something to sell. It is a real diamond, it is as hard as a natural one, and the saving is large. Check the grading report and the tint, expect almost no resale value, and ask how it was made.

Natural is worth the extra if rarity and origin matter to you, and you accept a smaller stone for the same budget. Both choices are sound once you know what you are buying.

If you would like to see both side by side, book a free consultation with our Hatton Garden team and we will work through the options against your budget.