Are Lab Grown Diamonds a Scam? An Honest Answer

Start with the thing people are really asking. When someone says "scam," they usually mean "is this a fake diamond dressed up as a real one." On that literal question, the answer is settled. A Lab Grown Diamond is pure carbon in the same crystal structure as a mined diamond. That structure is what gives any diamond its hardness, its way of bending light, and its fire. A Lab Grown stone has exactly that material and exactly that structure, so it is a diamond by definition.

This is not a marketing position. The Federal Trade Commission updated its Jewelry Guides to remove the word "natural" from the definition of a diamond, reasoning that a Lab Grown stone has the same physical and chemical properties as a mined one, so restricting the word "diamond" to mined stones would mislead buyers (FTC Jewelry Guides, 2018). The grading labs agree: GIA, IGI, and GCAL all issue reports for Lab Grown Diamonds. So a Lab Grown Diamond passes every test that makes a diamond a diamond. The stone is exactly what it says on the tag.

If the stone is real, why does the "scam" word keep coming up at all? Because there are two other worries hiding under it, and both deserve a straight answer rather than a brush-off.

The accusation almost always folds together two separate things, and separating them is the whole job. One is about money after the sale: the fear that you will spend real money and then find the diamond will not resell for anything close to what you paid. The other is about the transaction itself: the fear that a seller will hand you a cheaper stone that is not a diamond at all and charge you for one that is.

These are not the same, and only one of them is actually a scam. The resale worry is real, but it is true of every diamond ever sold, mined or Lab Grown, and it points to a misunderstanding about what a diamond is for. The simulant worry is a genuine fraud risk, and it has a clean, cheap defense. We will take each on its own terms.

Here is the part we will not soften: no diamond is bought as a resale asset. Not a Lab Grown Diamond, and not a mined one. Nobody buys a diamond the way they buy a stock, and expecting to sell it later for what you paid is the mistake, not the stone. We would rather tell you that up front than let you learn it later.

So when someone points at a Lab Grown Diamond and says "it will be worth nothing in ten years," the honest response is not to argue that it will appreciate, because it will not, and neither will the mined stone next to it. The response is that resale was never the point. A diamond is a love piece. It is something you choose and wear because it means something, not a security you buy expecting a return. Buying any diamond as an investment is the mistake. The stone is not the con; the framing is.

Read the "will it hold value" question that way and it stops being a strike against Lab Grown Diamonds specifically. If resale is not the reason to buy any diamond, then the fact that a Lab Grown stone costs well under a comparable mined one, for the same material and the same look, is simply money kept in your pocket on day one, not a loss you are setting up for later. You are paying for the thing you actually get to keep and wear, which is the whole reason to buy a diamond in the first place.

Now the concern that genuinely is a scam when it happens. A simulant is a stone designed to look like a diamond while being a completely different material. The two common ones are cubic zirconia and moissanite. Neither is a diamond. Selling one to you as a Lab Grown Diamond, at a diamond price, is fraud, plain and simple. This is the real thing to guard against, and it is exactly why the grading report exists.

The good news is that these are different materials, so they are provable, not a matter of opinion. Here is the plain breakdown.

To be fair to the simulants: cubic zirconia (zirconium dioxide) and moissanite (silicon carbide) are legitimate stones when they are sold as what they are. Moissanite in particular is hard and durable, and plenty of people choose it on purpose and are happy. The scam is never that these stones exist. The scam is only ever the swap, one material sold under another material's name and price. A stone becomes a fraud at the moment it is mislabeled, not at the moment it is made.

You do not need to become a gemologist to shut the door on the one real risk. You need the grading report, which is the document that already did the lab work for you. Three steps:

One note on reading the report itself: as of October 1, 2025, GIA stopped grading Lab Grown Diamonds on the full 4Cs and moved to simpler "Premium" and "Standard" tiers (Source: GIA, 2025-10-01), while IGI still issues the full 4C report. So if you want the detailed grades, ask for an IGI report. Either way, the point stands: a name on a tag is marketing, and the verifiable report is fact. For the longer walkthrough, see our guide on how to buy a Lab Grown Diamond, step by step.

Put the two worries back together and the picture is calm. The stone is a real diamond, so it is not a scam. Resale was never the reason to buy any diamond, so a Lab Grown stone not appreciating is not a mark against it; it is just the truth about diamonds generally. And the one situation that genuinely would be a scam, a simulant sold as a diamond, is defeated in five minutes by a report you can verify yourself for free.

What you get for that lower price is exactly what makes a diamond a diamond: the same carbon, the same 10 on the Mohs scale, the same optics, indistinguishable to the eye from a mined stone of the same grades. You are buying the thing you will actually wear, not a bet on a resale market that does not really pay out for anyone. A diamond is a love piece. Judged as a love piece rather than as an asset, a well-graded Lab Grown Diamond is one of the most honest purchases in the category.

That honesty is the standard we set our own work to. We source Lab Grown Diamonds, hand-set and finish every ring in New York City, and sell direct to consumers, so every stone we sell ships with the graded report we just told you how to check. If it helps to talk it through the way you would with a jeweler across a counter, that is what we are here for.