Stones cut by hand more than a century ago. Antique Old Mine Cut Diamond Bangle, 18K gold, circa 1900
Let me say the honest part first, since I sell one side of this argument: lab grown diamonds are real diamonds. Chemically and optically they are the same stone, they cost a fraction of the natural price, and if your only goal is the biggest, whitest stone for the money, a lab grown brilliant wins and you do not need my permission to buy one.
What the price tag does not tell you is what happens to that value afterwards, and what you give up in character. That is where antique diamonds make their case, and it is a strong one.
What is the actual difference?
| Antique diamond | Lab grown diamond | |
|---|---|---|
| What it is | Natural diamond, mined and cut by hand 100+ years ago | Real diamond grown in a reactor in weeks |
| Cut | Old mine, old European, rose cut: unique, cut for candlelight | Modern brilliant, machine-perfect and identical |
| Supply | Finite and shrinking; no more will ever exist | Unlimited, production grows every year |
| Price per carat | Below new natural, above lab grown | The cheapest by far, and still falling |
| Resale value | Holds a real market; antique cuts have collectors | Close to none, and shrinking with the retail price |
| Footprint | Already mined a century ago; reuse, not extraction | No mining, but energy-hungry production |
Why do lab grown diamonds lose their value?
Because supply is unlimited and production keeps getting cheaper. Lab grown retail prices have fallen dramatically year after year, and a stone bought today competes tomorrow with a newer, cheaper identical one. There is no meaningful secondhand market: jewellers have little reason to buy back a stone they can order new for less. None of this makes lab grown a bad purchase; it makes it a consumer product, like electronics. Buy it to enjoy it, and count the money as spent.
The modern brilliant: perfect, symmetrical, identical. Diamond Solitaire Studs, 0.75 ct, 18K gold
Why do antique diamonds hold value better?
Three reasons. Supply: every antique diamond that exists has already been cut, and the number only shrinks. Demand: collectors and a growing group of buyers actively want old mine cuts, old European cuts and rose cuts, precisely because no new ones are made. Character: a hand-cut stone is one of one, with its slightly off-center culet and its broad, slow fire. I will not promise you appreciation; diamonds are not an investment plan. But an antique stone participates in a real market with real scarcity, and a lab grown stone does not.
No two alike, by definition. Old Mine Cut Diamond Earrings, 18K white gold
Which is more ethical and sustainable?
Both sides sell a clean conscience, and both oversimplify. Lab grown avoids new mining, which is genuinely good, but growing diamonds takes serious energy, and "sustainable" marketing rarely shows the power bill. An antique diamond was mined generations ago under standards nobody would defend today; that history is real and worth being honest about. What is equally real: buying it today extracts nothing new from the ground. It is reuse in its purest form, the same logic as any antique. If footprint is your deciding factor, a stone that has already existed for 150 years is hard to beat.
So which should you buy?
Buy lab grown if you want maximum size and whiteness per dollar, you are certain resale will never matter to you, and modern perfection is the look you love. Buy antique if you want a stone with a history and a face of its own, a real secondhand market behind it, and nothing newly mined on your conscience. And if you are deciding for an engagement ring: the antique will still be the rarer object in fifty years, guaranteed, because they are not making any more of them.
Frequently asked questions
Are lab grown diamonds real diamonds?
Yes. They are chemically and optically identical to natural diamonds, and gem labs can identify them with specialist equipment. Real is not the question; scarcity and value retention are.
Do lab grown diamonds hold their value?
No. Retail prices have fallen steeply and the resale market is close to nonexistent, because supply is unlimited. Treat a lab grown stone as a purchase to enjoy, not an asset.
Are antique diamonds cheaper than new natural diamonds?
Usually yes, per carat, for comparable quality. They typically sit between lab grown and new natural in price, while being the only category that is genuinely finite.
Can you tell an antique diamond from a modern one?
Usually, yes, by the cut: a small table, tall crown, open culet and hand-cut facets mark old mine and old European cuts. A trained eye, or a lab report, settles it definitively.
Are antique diamonds ethical?
They were mined long ago, often under conditions that would not be accepted today, and buying one today funds no new mining at all. Most buyers weigh that as the most sustainable diamond choice available; the honest framing is reuse, not purity.
Is an antique diamond good for an engagement ring?
Yes, with one practical note: antique cuts glow rather than glitter, and open culets and thinner girdles deserve a protective setting and a jeweller who knows old stones. In exchange you get a ring nobody else has.
Every diamond in my shop is antique or vintage, described with its cut, and none of them will ever be made again.
Read next: What is an old mine cut diamond? · Old European cut vs old mine cut · What is a rose cut diamond?
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