We sell both. We sit two doors from the Antwerp diamond bourse, source from neighbours who deal in mined stones for a living, and we also stock lab-grown for clients who want them. We have no commercial reason to push you toward either one — what we have is eight years of watching the market move and a clear view of what each option means for the piece you're actually commissioning.

The short version: the price gap between natural and lab-grown has gone from about 30% in 2019 to roughly 65–80% in 2026. That number explains most of the rest of this article.

What lab-grown actually is

Chemically identical to mined diamonds. The same carbon, the same isometric crystal structure, the same physical and optical properties. Two production methods exist:

  • HPHT (High Pressure, High Temperature) — the older method, simulating natural conditions
  • CVD (Chemical Vapour Deposition) — newer, now dominant, where a diamond seed is grown layer by layer in a methane-rich plasma chamber

Most lab-grown stones sold today are CVD. They're indistinguishable from natural diamonds without specialised equipment. Even a master setter looking at a stone under 10x magnification typically can't call it.

What's actually different

Natural Lab-grown
Origin Mined, geological Grown, industrial
Visual appearance Identical Identical
Physical properties Identical Identical
Production volume Fixed by extraction rate Scaling with demand
Price (2026) Reference ~65–80% below natural
Resale value 30–50% of retail Effectively zero
Certification GIA, HRD, IGI GIA, HRD, IGI (with "lab-grown" notation)
Inscription on girdle Optional, certificate number Mandatory: "lab-grown" + cert #

The price column is moving. Lab-grown manufacturers add capacity every quarter, and the per-carat price has fallen roughly every six months for the last three years. A stone you buy today for €1,500 may be retailing at €1,200 in twelve months.

When we recommend lab-grown

  • You're maximising carat for a budget. A 2-carat lab-grown costs roughly what a 0.7–0.9-carat natural costs, with no visible difference.
  • The stones are small. Melée and accent stones, where the per-stone economics matter and resale value of the individual stone is irrelevant. We use lab-grown melée by default in trade casting work and most bespoke pavé.
  • The piece is meant to be replaced, not inherited. A fashion piece, a self-purchase you might re-make in five years, a gift where the future-proof story is less important.

When we recommend natural

  • An engagement ring meant to be passed on. The resale floor matters when a piece is worn for forty years and inherited. Natural retains a market; lab-grown's market keeps falling.
  • The story matters at the price point. Above €10,000 for a centre stone, the provenance story is part of what you're buying. A natural diamond cut in the Diamond District has a story; a stone grown in a Chinese reactor doesn't, however identical the chemistry.
  • Investment-grade stones. D-flawless, large fancy colours, exceptional cut grades — these have collector value that lab-grown will probably never replicate.

The honest part

Don't let anyone tell you lab-grown is "fake." It isn't. The atomic structure is the same, the optical properties are the same, the hardness is the same. Anyone claiming otherwise is selling you something or has been sold something.

Don't let anyone tell you natural is "obsolete." The market hasn't gone there. Resale data says it isn't going there soon. The natural diamond market has survived both lab-grown's introduction and its rapid commoditisation, and prices on top-quality stones haven't fallen.

Choose based on the specific piece, not on ideology.

What we'd actually buy

For an engagement ring centre stone above €5,000: natural, every time, for the centre. Lab-grown for any pavé, halo, or accent stones in the same piece — saves €500–€1,500 with zero visible difference.

For an engagement ring centre stone below €5,000: depends on the carat target. If you want 1+ carat presence on a small budget, lab-grown is the only path. If you'd rather a smaller natural with the resale floor intact, that works too.

For a wedding band with diamonds: lab-grown. The stones are small enough that nobody is reselling them anyway, and you save real money.

For a memorial piece, signet, or pendant where a single stone is the centrepiece: natural. The story matters; the resale floor matters.

For a re-setting of an heirloom stone: the stone you have is the stone you have — natural by definition because lab-grown wasn't produced commercially before about 2015.

What to do next

By Antwerp Ateliers. This piece reflects the consensus view of the bench, the diamantaires we work with daily, and eight years of stone-buying for clients across Europe.