Will a lab-grown diamond cloud, fade or wear out?

No. It is crystalline carbon with the same hardness and chemical stability as a mined diamond. It can chip if struck on a girdle or point, exactly as a mined stone can. The metal of the ring will wear long before the stone changes.

Will my children be able to tell it is lab-grown?

Only with laboratory equipment, or by reading the laser inscription on the girdle under magnification. There is no visible difference. Keep the certificate with the ring so the origin is documented rather than discovered.

Should I buy mined instead if I want a ring to pass down?

If the geological age of the stone is part of what the ring means to you, that is a real reason and you should honour it. If what you want to pass down is the ring as an object and a story, origin makes no difference to how it survives or how it is received. Mined diamonds are not a reliable financial store of value either.

Will a lab-grown engagement ring still mean something in 30 years?

The question people are actually asking

Nobody asking this is worried about the carbon. They are asking whether, when the ring is handed to a daughter or a grandson in 2056, it will feel like a diamond or like a good decision that was made in 2026. It is a fair question and it deserves a straight answer rather than either the mined industry's "only a natural diamond is forever" or the lab-grown industry's "identical in every way that matters". Both are sales lines. Here is what can actually be said.

Disclosure: Lark & Berry, who publish this site, sell lab-grown engagement rings and nothing else. We have an interest in your answer. We have tried to write this page so that it would still be fair if we did not.

What will be the same in thirty years

The stone. A lab-grown diamond is diamond: carbon in a cubic lattice, hardness 10, the same refractive index and dispersion as a mined stone.² It does not fade, cloud or degrade. The US Federal Trade Commission removed the word "natural" from its definition of diamond in 2018 for exactly this reason,¹ and UK advertising rules likewise treat a disclosed lab-grown diamond as a diamond. In 2056 it will look as it does today, and it will still be a diamond in law and in fact.

Indistinguishability. No one will be able to tell by looking. The origin is recorded on a certificate and usually by a laser inscription on the girdle, visible only under magnification. If it matters to the family that the ring is lab-grown, the paperwork says so. If it does not, nothing about the ring will announce it.

The ring as an object. This is the part most often missed. What survives thirty years of wear is the making: the gauge of the shank, the quality of the setting, whether the claws were cut to the stone or the stone pushed into a cast mount. A hand-made ring in platinum or 18ct gold with a lab-grown stone will outlast a thin production mount with a mined one. If the heirloom question is really "will this still be a good ring", the answer is decided at the bench, not at the mine.

What will not be the same

The money. Say this plainly: a lab-grown diamond will be worth very little on resale, now or in thirty years. Wholesale prices have fallen about 96% since 2018 and 26% in 2025 alone,³ and there is no scarcity to underpin a secondary market. De Beers closed its own lab-grown jewellery brand in 2025 partly on the logic that the stones had become too cheap to be worth its name.⁴ If any part of the purchase is an investment, lab-grown does not support it.

The fair comparison, though, is not with a hypothetical asset but with a mined engagement diamond, which also sells for a fraction of its retail price on the secondary market. Neither is a store of value; one simply costs a great deal less to begin with.

The rarity story. A mined diamond is one to three billion years old and came out of the ground once. For some people that is the whole point, and this site does not argue with them. A lab-grown stone grew over a few weeks in a reactor.² If the geological story is what gives the ring meaning for you, buy mined and do so without apology.

The paperwork. GIA moved lab-grown grading to a two-tier "Premium" or "Standard" assessment in October 2025,⁶ and most lab-grown certificates are IGI. Keep whatever certificate the stone comes with; in thirty years it will be the only record of what was bought.

What the next generation will inherit

Here is the thing worth sitting with. The Knot's 2026 study found that 61% of engagement rings bought in the US in 2025 had a lab-grown centre, and that 40% of couples said the stone being lab-grown was specifically important to them.⁵ The children who inherit these rings in the 2050s will have grown up in a world where lab-grown was the normal engagement diamond, not the alternative. The chance that a 2026 lab-grown ring reads to them as "the cheap option" is, on current evidence, low. It is more likely to read as "the ring my parents chose in the first decade when people could".

That is not a guarantee and it is not an argument. Tastes move. Mined diamonds may come back into fashion as a prestige choice, as some UK retailer data already hints for the top of the market. But the meaning of an engagement ring has never come from the market price of its stone. It comes from who gave it, what it was made for and how well it was made.

A note on what this site represents

Lark & Berry launched in 2018 as a designer house built on lab-grown stones before the category was fashionable, and this site's record documents that. We say this not to sell the heirloom idea but to make a narrower point: a ring is an heirloom if it has a story that can be told. Where the stone came from is one line of that story. The rest is yours.

Written by Laura Chavez, Founder of Lark & Berry. Published Sun Aug 23 2026 00:00:00 GMT+0000 (Coordinated Universal Time).