Lab-Grown Diamond Disclosure: What US Jewelry Listings Must Make Clear

A jewelry listing can be entirely accurate about the stone and still mislead a buyer about what kind of stone it is. That is the narrow problem behind most lab-grown diamond disclosure failures: the page never says “mined,” but the title, the word “real,” the certificate line, or a “cultured” label left standing alone tells the shopper to assume something the product is not.

The short answer is not “add one disclaimer.” It is to keep three things consistent across the entire page: what the stone is (mined diamond, laboratory-created diamond, or a different material such as moissanite), what the copy implies about its origin, and what the certificate and platform documents prove. Federal jewelry guides govern the wording. Marketplace rules add document and photo matching on top. A wording checker can help with the first layer only.

This review uses the FTC Jewelry Guides in 16 CFR Part 23, the FTC’s 2018 final rule preamble, and TikTok Shop’s current US jewelry requirements. Sources were reviewed on 2026-10-26. It covers federal advertising and platform rules, not state-specific jewelry statutes or legal advice.

What federal law actually says about the word “diamond”

The FTC’s Jewelry Guides define a diamond by its material properties: a mineral consisting essentially of pure carbon crystallized in the isometric system, with stated hardness, specific gravity, and refractive index (16 CFR 23.12(a)). A laboratory-created diamond can meet that definition. The Guides do not say that the word “diamond” is reserved for mined stones.

That nuance matters because it is easy to overcorrect in the wrong direction. The same section says it is deceptive to use the unqualified word “diamond” for an object that does not meet the definition (23.12(b)). A cubic zirconia or a moissanite does not meet it. A lab-grown diamond generally does.

What the Guides do police is the implication of mined origin and the use of unqualified “cultured”:

• “Real,” “genuine,” “natural,” and similar terms may not be used for an industry product that is manufactured or produced artificially (23.27). A lab-grown diamond is produced artificially for this purpose, even though it is chemically a diamond.
• “Cultured” used for a laboratory-created diamond must be qualified by a clear and conspicuous disclosure that the product is not a mined stone, such as “laboratory-created,” “laboratory-grown,” or “[manufacturer name]-created” (23.12(c)(3)). The FTC’s 2018 preamble explains that the qualifier does not have to sit immediately next to the word “cultured” in every layout, as long as the non-mined origin is disclosed clearly and conspicuously. Putting it next to the term is still the safest habit.
• For laboratory-created gemstones other than diamond, the stone name or a word such as “stone,” “gem,” or “gemstone” must be immediately preceded, with equal conspicuousness, by a qualifier such as “laboratory-grown,” “laboratory-created,” “imitation,” or “simulated” (23.25(b)). The Guides also state that “faux” is not an adequate disclosure that the stone is not mined.

So there is no single federal sentence that says every jewelry title must begin with “lab-grown.” The defensible rule is narrower and more useful: do not use mined-origin language for a lab-grown stone, do not leave “cultured” unqualified, do not call a simulant a diamond, and make the origin clear enough that a reasonable shopper does not have to infer it from a footnote. When the page is ambiguous, the marketplace and the customer usually resolve that ambiguity against the seller.

Three stone identities your copy must keep separate

Most bad jewelry copy comes from blending three different products into one set of adjectives. They are not interchangeable, and each needs a different document trail.

A simulant is the clearest failure case. Moissanite is not a laboratory-created diamond; it is a different mineral. “Lab-grown moissanite” is accurate, but “lab-grown diamond” is not. If the stone is cubic zirconia, the safest disclosure is the material name, not a diamond comparison that survives only in the fine print.

Where the disclosure has to survive on the page

Marketplace reviewers and shoppers do not read a listing in the order you wrote it. They see the title, the first image, a bullet, the specification table, a video, and then the certificate. A disclosure that exists in only one of those places is fragile.

• Title: put the origin next to the stone name, not after a slash at the end. “1.00 ct Lab-Grown Diamond Solitaire Ring” is clearer than “1.00 ct Diamond Ring — Lab”.
• Bullets: repeat the origin once in the stone description. Do not use “real” or “genuine” as a synonym for “high quality.”
• Specification table: name the stone, the carat weight, the cut, and the report number. “Stone: Diamond” is ambiguous on a lab-grown SKU, and “TCW” must mean total carat weight when the item has more than one stone.
• Image text and overlays: a badge that says “Real Diamond” is a claim, even if the title says lab-grown. Remove it or change it to “Lab-Grown Diamond.”
• Video and LIVE scripts: “It’s a real diamond, just grown in a lab” is still a “real diamond” claim. Say “lab-grown diamond” and keep the rest of the sentence about cut, setting, or certification.
• Certificate line: “IGI certified” alone does not tell the shopper what the certificate covers. State the report number and that the report identifies the stone as laboratory-created.

The same consistency test applies to treatments. Under 16 CFR 23.24, a treatment to a gemstone must be disclosed if it is not permanent, creates special care requirements, or significantly affects value. Online listings must make that disclosure in the product description, not only at a physical point of sale. A growth method is not automatically a “treatment,” but post-growth treatment can be. If the supplier’s disclosure sheet mentions treatment, do not bury it in a PDF the buyer never sees.

Platform checks sit on top of the federal rule

TikTok Shop publishes a US Jewelry Products Requirements page (page dated 09/01/2026). It requires sellers to keep product photos, packaging photos, test reports, and authenticity documents consistent with the listing, and it states that listings must not make false, misleading, or unsupported claims. For diamonds, the page separates the certificate source by origin: natural diamonds require an AGS or GIA certificate, while lab-created or artificial diamonds require an IGI or GIA certificate. The certificate must show the cut and carat and match the product image. A listing may be rejected when required documents are missing, unclear, altered, or inconsistent with the photos. Enforcement can include listing removal, account-health points, or loss of selling access.

That platform rule does something a federal wording rule cannot: it ties the claim to a document. A title that says “lab-grown” while the uploaded certificate is for a mined stone, or a photo that shows a different cut than the report, is a document mismatch even if the words are otherwise careful.

Amazon sellers have reported the same failure mode from the other direction. In a Seller Forums thread dated February 13, 2026, a seller wrote that its lab-grown diamond line received multiple policy violations and was at risk of removal. The public thread is a seller report, not an Amazon policy statement, but it shows why the wording and the documentation need to be reviewed together rather than after a violation arrives. Amazon also separates fine jewelry from fashion jewelry in its category help, so confirm which rules apply to the item before you rely on a generic listing template.

A hypothetical listing, reviewed line by line

Consider a hypothetical lab-grown diamond solitaire listing. The stone is a diamond; the copy still has five disclosure problems.

The revised lines are not magic words, and they do not guarantee approval. They do remove the specific implications the Guides treat as deceptive and make the platform’s document check possible.

A six-step disclosure audit before you publish

1. Assign an identity to every SKU. Mined diamond, laboratory-created diamond, or simulant. If the supplier cannot state which one in writing, stop there; copy cannot fix an unknown stone.
2. Search for origin implications. Look for “real,” “genuine,” “natural,” “earth-mined,” “mined,” and any image text or video script that uses them. Remove them from lab-grown SKUs.
3. Check every “cultured” and every non-diamond gem name. Qualify “cultured” clearly as laboratory-created; for lab-grown colored stones, put the qualifier immediately before the stone name with equal prominence.
4. Reconcile the whole page. Title, bullets, specifications, image overlays, video script, and certificate line must tell the same story about origin, carat, cut, and material.
5. Match the certificate to the exact item. Confirm the lab, report number, carat, cut, and photo. A certificate for a different stone does not support the listing.
6. Keep substantiation for every extra claim. Environmental, “conflict-free,” and durability claims need their own evidence. If you cannot produce it, delete the claim rather than balancing it with a disclaimer.

What a text checker can and cannot settle

A compliance checker can flag phrasing such as “real diamond” or unqualified “cultured” before you publish, and it can help you rewrite a bullet consistently across a catalog. It cannot tell you whether the stone in the photo is the stone in the certificate, whether the certificate is authentic, whether the lab is acceptable to a marketplace, or whether a state jewelry law adds a requirement. Those are document and product-verification jobs.

Use the checker as a first pass on the words, then do the document matching by hand. Treat platform approval as a separate outcome from legal compliance; a listing can be approved and still make a claim the seller cannot support.

Frequently asked questions

Is a lab-grown diamond legally a diamond in the US?

Under the FTC’s definition, a laboratory-created stone that has essentially the same optical, physical, and chemical properties as a mined diamond can be described as a diamond. The Guides prohibit using “real,” “genuine,” or “natural” for an artificially produced stone, so the accurate phrase is “lab-grown diamond” or “laboratory-created diamond,” not “real diamond.”

Can I call it a “cultured diamond”?

You can, but not by itself. Section 23.12(c)(3) requires a clear and conspicuous qualification that the product is not mined, such as “laboratory-created” or “laboratory-grown.” The FTC’s preamble allows the qualification to appear somewhere clear rather than immediately adjacent in every layout, but adjacent wording is the least risky choice. “Cultured diamond” alone is the version most likely to be read as a mined-diamond claim.

Do I have to put “lab-grown” in the title?

There is no single federal sentence that requires those exact words in every title. The requirement is not to mislead about origin. In practice, putting the origin next to the stone name is the cleanest way to avoid an implied mined-origin claim, and marketplace document matching makes an explicit origin the safer path. If the title says only “diamond” while the page uses mined-diamond cues, the omission becomes the problem.

Is moissanite a lab-grown diamond?

No. Moissanite is a different mineral, so it is a simulant when used in place of a diamond, not a diamond of any origin. Call it moissanite. Calling it a “lab-grown diamond” is a material misdescription, and no disclaimer elsewhere on the page fixes the stone name.

Does an IGI or GIA certificate make my listing compliant?

No. A grading report supports specific facts about a specific stone, such as carat, cut, and whether it is laboratory-created. It does not approve your title, your bullets, your image overlays, or your environmental claims, and a report for a different stone does not support the listing at all. TikTok Shop’s US jewelry requirements also require the report to match the product image and the submitted documents.

Sources

• Electronic Code of Federal Regulations · 16 CFR Part 23, Guides for the Jewelry, Precious Metals, and Pewter Industries — current text of 23.12, 23.24, 23.25, and 23.27 (source: 83 FR 40667, Aug. 16, 2018; reviewed 2026-10-26). ecfr.gov
• Federal Trade Commission · Guides for the Jewelry, Precious Metals, and Pewter Industries; Final Rule (83 FR 40665, Aug. 16, 2018) — preamble explaining the “cultured” qualification and man-made gemstone guidance (reviewed 2026-10-26). federalregister.gov
• TikTok Shop US · Jewelry Products Requirements (page dated 09/01/2026; reviewed 2026-10-26). seller-us.tiktok.com
• Amazon Seller Forums · Lab-Grown Diamond Policy Compliance Issues (seller-reported thread, Feb. 13, 2026; reviewed 2026-10-26). sellercentral.amazon.com

This article explains published federal advertising guidance and platform requirements for general information. It is not legal advice, and a marketplace or regulator makes the final decision on a listing.

To catch mined-origin wording, unqualified “cultured,” and other risky phrases before you publish, run the draft through the ad compliance checker. For the listing and catalog workflow around it, see ecommerce compliance checks, and for the metal-content rules that sit next to stone disclosure, read gold filled vs. gold plated.