What Falling Lab-Grown Diamond Prices Reveal About The Value Of "Real"

Thought process

Thought prA one-carat lab-grown diamond now retails for somewhere between $400 and $750, down from roughly $3,410 in 2020. That is an eighty-eight percent collapse in five years, and it has landed hard on the industry's biggest name: De Beers has taken a $2.3 billion impairment on its diamond unit, and its parent company Anglo American reported a $3.7 billion net loss for 2025. Few price movements in luxury have been this steep, or this revealing.

The cause was supply rather than any question of quality. Global lab-grown production capacity grew more than threefold between 2020 and 2023 as new factories scaled across China and India, arriving faster than retailers could sell through their inventory. Wholesale prices fell further still into 2026, and the industry analyst Edahn Golan recently reported no clear bottom yet in sight. When a product can be made in ever greater volume, its price tends to find that reality eventually.

Consumers have moved with striking speed. Lab-grown stones now account for the majority of US engagement ring purchases, up from a small fraction only a few years ago. Pandora removed natural diamonds from its collections entirely in 2024 in favour of lab-grown and alternative stones, and its sales have grown since. De Beers has responded by cutting its own rough prices and trimming production, after years of quietly discounting stones well below its published list.

The clearest measure of how far the downturn has spread came in July 2026, when De Beers said it would suspend production for two years at Venetia, South Africa's highest-value diamond mine and the source of more than forty percent of the country's output. The mine employs over four thousand people. The company pointed to falling prices, softer Chinese luxury spending, competition from lab-grown stones and trade tensions, a combination that has weighed on the business since the pandemic. Anglo American, which put De Beers up for sale in 2024, has yet to find a buyer.

The environmental comparison, often deployed in marketing on both sides, is less settled than either camp suggests. A polished natural diamond carries an estimated 160kg of CO2 per carat, on top of the considerable earth displaced to extract it, land that cannot be fully restored. Lab-grown stones can emit a tiny fraction of that when grown on renewable electricity, but a great deal more when manufactured on coal-reliant grids, where much of current supply sits. Which stone costs the planet less depends almost entirely on what was powering the factory, a detail that rarely reaches the price tag.

The more interesting shift is what the collapse has revealed about the product itself. A lab-grown diamond is chemically and optically identical to a mined one, indistinguishable to most jewellers without specialised equipment. What separated their prices for a century was never the stone but the story attached to it, the idea that something took a billion years to form before a person found it. Remove the story and the value built on top of it tends to follow. That logic is now circling back on lab-grown stones too, whose resale values sit well below their original price and continue to slide, because expanding supply leaves no scarcity to hold a floor. Natural diamonds, for all their lost market share, still have one.

The shift is real, but it is not only a story of loss, and that is the part worth watching. De Beers' shrinking slice of a smaller pie is being absorbed elsewhere: by lab-grown producers building an entirely new and more accessible price tier, by a growing antique and vintage market where a stone's history is the selling point rather than its size, and by independent jewellers whose sales are holding up precisely because they lead with craft and narrative rather than carat weight. Overall US jewellery spending is still projected to grow in 2026. The money has not left diamonds so much as redistributed toward whoever tells the more convincing story about the stone.

What that points to is a market reorganising around meaning rather than material. As the stone itself becomes abundant and effectively free of mystery, value is migrating to the things that cannot be mass-produced: provenance, design, craftsmanship, the reason a particular piece exists. The future of the diamond looks less like a single price sliding downward and more like a widening spread, with manufactured stones settling into an everyday tier while natural and vintage pieces trade on scarcity and history at the top. In a category that always sold a story as much as a stone, the winners of the next decade will be whoever tells the most convincing one, whether the diamond in question is a century old or a week old.