Diamonds Aren't Timeless. They're Worthless.

A 1-carat diamond on Alibaba costs €119.

Same stone, D color, VVS2, excellent cut, at a normal jeweler? €700 to €900.

That's not a markup. That's a tax on people who don't know.

De Beers made up "A Diamond Is Forever" in 1947.

Not a geological fact. A slogan.

They controlled 90% of global supply, stockpiled the rest, and told everyone diamonds were rare. They weren't. They never were. Diamonds are just carbon, and carbon is everywhere.

The scarcity was manufactured. The romance was manufactured. The price was manufactured.

And now the whole thing is collapsing because we figured out how to grow them in a lab.

Same atoms. Same structure. Same hardness. Same sparkle.

The only "fake" thing about a lab-grown diamond is the price.

There are two ways to grow them:

HPHT, squeeze carbon at insane pressure and heat until it crystallizes. Done in China. Cheap, fast, makes small stones.

CVD, put a diamond seed in a vacuum chamber, blast it with methane and microwaves, and let it grow layer by layer like frost on a window. Done in India. Makes bigger, cleaner stones.

That's it. That's the whole magic. No mantle, no billion years, no volcano. Just energy and time.

This is the part nobody wants you to know.

The minimum order on Alibaba for a 1-carat D/VVS2 lab diamond is one stone. Not a thousand. One. No business license. No reseller permit. Just a credit card and an address.

Here's what you actually pay, delivered to your door, April 2026:

• 1 carat, €119
• 2 carat, €238
• 3 carat, €390

The price scales linearly with size. Because the cost is just energy and time. A 3-carat stone takes 3x as much electricity as a 1-carat. That's it.

Now look at what a regular jeweler charges for the same stone:

• 1 carat, €700 to €900 (7x markup)
• 3 carat, €3,000 to €5,000 (8 to 13x markup)

What does that markup pay for?

A GIA certificate costs €30 to €50. Shipping and insurance, maybe €20.

Everything past €160 is margin.

The markup pays for ignorance. That's the whole game.

In 2000, the markup made sense, you needed someone to source the stone, explain the 4Cs, hold it up to the light. In 2026, you have the internet. The information gap is gone. The store is selling you something you can buy yourself for one-seventh the price.

Pink diamonds were supposed to be impossible to grow in a lab. The industry said the color came from "plastic deformation during volcanic eruption", which is a fancy way of saying we don't know, but it's rare, so it's expensive.

A natural Fancy Vivid Pink, 1 carat, sells for over $1 million.

A lab-grown one, same color, same carat, same certificate? $8,000 to $20,000. Same stone, 98% off.

Blue is even worse. Natural Fancy Intense Blue: $200,000 to $1,000,000 per carat. Lab-grown blue: $2,000 to $8,500. That's a 99% discount.

Because here's the truth about lab-grown color: it's a recipe.

Add nitrogen → yellow. Add boron → blue. Engineer nitrogen vacancies and anneal at high temp → pink. Irradiate after growth → green.

The CVD reactor doesn't know what color it's making. The energy cost is the same. The only thing that changes is the gas mix.

So when a jeweler charges you a million dollars for a pink diamond because it's "rare," remember: a machine can make the same stone next week for two grand.

The cost of growing a diamond is energy. That's the floor.

Now look at the prices on Alibaba again. €119 for 1 carat = ~$130. That's already at the production-cost floor for China.

This is the same trajectory as solar panels. Same as LED bulbs. Same as flat-screen TVs. The cost only goes down. The technology gets better. The factories scale up.

Diamonds aren't a luxury good anymore. They're a manufacturing output. And manufacturing outputs converge to cost-plus-margin pricing, eventually.

By 2030, a 1-carat lab diamond will be $200 to $400 retail. By 2035, it'll be $50 to $150.

And natural diamonds? They'll still exist. But not as an investment. Not as a "store of value." That part is done. A diamond loses 60-80% of its retail value the moment you walk out of the store, and the value keeps dropping every year as lab prices fall. It's the opposite of gold.

Diamonds are not forever. They're depreciating assets with good PR.

A few years ago, I got pulled into a group of investors looking at buying a French lab-grown diamond company called Diam Concept.

The story is wild. Diam Concept was founded by Alix Gicquel, a professor who built France's first plasma-for-diamond research team back in 1990. Thirty years of research. Custom microwave plasma reactors she designed herself. She could grow whites, yellows, pinks, blues, the full spectrum. She had eight patents and 170 published papers. The science was world-class.

In 2020, the company raised €5.2 million from Chanel, the Wertheimer family (Chanel's owners), and a couple of French VC funds. Luxury money. The kind of backing that's supposed to guarantee success.

By 2022 the company was losing €700,000 a year. By May 2024 it was in receivership.

We did the due diligence and the math was simple and brutal:

• French industrial electricity: €0.187/kWh → $200+ per carat in energy alone
• French skilled labor: €30K–80K per technician per year
• Chinese competitor on Alibaba: 1 carat D/VVS2 for $130 delivered

You can't compete with that. Not in France. Not at French electricity prices. Not ever.

We walked away. So did everyone else.

In the end, nobody bought the company.

People bought the leftover stones, the uncut roughs, the polished pieces sitting in inventory. For pennies on the dollar. True market value.

The technology? The patents? The reactors that took 30 years of research to design?

Worth nothing in the jewelry market. The only viable path forward for European CVD is industrial applications, semiconductor substrates, quantum sensors, optical windows. Places where diamond's purity matters and the buyer pays for physics, not for sparkle.

Alix Gicquel had the best diamond technology in Europe. She lost to the electricity bill.

That's when I knew: this industry is over. Not slowly. Not eventually. It's already over, most people just don't know it yet.

If you're getting engaged, get a lab-grown stone. Save 80%. The diamond is identical. The only thing you're losing is the markup.

And if you already have a natural diamond, don't sell it. Just keep it for what it is: a beautiful rock with a great story.

Just don't pretend it's an investment.

Diamonds aren't timeless.

They're just expensive until they aren't.