De Beers, the company that spent a century keeping diamond prices high by controlling supply, is now on the block. The business was valued at nearly $13 billion in 2011 and may fetch about $1 billion today — a collapse that tracks a broader rout in the diamond trade as lab-grown stones flood the market.
Bloomberg's Diamond Standard Index, which tracks investment-grade stones, just hit its lowest level in more than 20 years. A certified 1-carat lab-grown diamond now sells wholesale for $76 to $87, according to analyst Edahn Golan. That's not a typo. Walmart sells half-carat lab-grown diamond earrings for $12.
How a $100 diamond bet went bad
Put $100 into gold in 2011 and it's worth $216 today. Silver? $122. Diamonds? $30. That comparison, from market data tracking those three assets, tells the story of a decade in which the one thing that wasn't supposed to lose value quietly did exactly that.
Lab-grown diamonds are chemically identical to mined ones — same carbon, same crystal structure. They're graded by the same laboratories that grade natural stones. A jeweler cannot tell them apart without a machine. What separates them is provenance, and increasingly, price.
The engagement ring test
Among US couples who married in 2025, 61% chose a lab-grown engagement stone, according to The Knot. That's a majority. The generation that grew up hearing "diamonds are forever" is buying the version that costs a fraction of the price and looks the same under a loupe.
For people who already own natural stones and hope to sell, the math is grim. Diamond analyst Paul Zimnisky said owners selling a stone might recover about half of what they paid. His advice was blunter: "For most people, I wouldn't look at it as an investment."
A floor, not a recovery
Natural diamond prices ticked up in September 2026, according to Rapaport data. Golan characterized those gains as an early sign of stability rather than a recovery. That distinction matters. Stability means prices have stopped falling. It doesn't mean they're going back to 2011 levels.
The structural problem is simple. Gold has one global price and a supply that no factory can add to. Diamonds now have neither. When you can manufacture a visually identical product in a lab for double-digit dollars per carat, the scarcity story that underpinned De Beers' business for generations stops working.
Central banks are buying something else
Gold, meanwhile, trades near $4,157 — about 23% below its January 2026 peak, but still more than double where it sat 15 years ago. China's central bank made its largest gold purchase since 2023 in September 2026, a signal that at least one major buyer still wants hard assets it can't synthesize.
Silver trades at $60.46, having nearly halved since topping $116. Even the metals that held up better than diamonds are well off their highs.
The De Beers sale process is underway. What a buyer gets for roughly $1 billion is a brand, a mining operation, and a marketing apparatus built to sell a scarcity that no longer exists. The next chapter gets written by whoever signs the check — or by whoever decides the price isn't worth paying.
