How Should Lab-Grown Diamonds Be Disclosed?
Compliance Guide • Published July 15, 2026
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Clear descriptions should accompany lab-grown diamond products from adverts to checkout pages.
Lab-grown diamonds should always be described using clear language that identifies their laboratory-grown origin.
The disclosure should appear prominently wherever the jewellery is advertised or sold. It should not be hidden in a product specification, tooltip, FAQ page or terms and conditions.
A buyer should be able to understand that the diamond was created in a laboratory before clicking “Add to basket”.
Quick Answer
Terminology Recommendations
| Description | Recommended use |
|---|---|
| Laboratory-grown diamond | Clear formal terminology suitable for product pages and documents |
| Laboratory-created diamond | Clear alternative that identifies the diamond’s origin |
| Lab-grown diamond | Widely understood consumer-facing terminology |
| CVD laboratory-grown diamond | Use when the growth method has been confirmed |
| HPHT laboratory-grown diamond | Use when the growth method has been confirmed |
| Diamond | Do not use alone when describing a laboratory-grown diamond |
| Real diamond | Potentially confusing when the laboratory-grown origin is not equally prominent |
| Cultured diamond | Avoid using without an immediate laboratory-grown qualifier |
| Eco diamond | Avoid unless the exact environmental claim is defined and evidenced |
| Ethical diamond | Avoid as an unsupported general claim |
| Fake diamond | Inaccurate description of a lab-grown diamond |
| Diamond simulant | Not an appropriate description of a lab-grown diamond |
1. Why Lab-Grown Diamond Disclosure Matters
Lab-grown diamonds share fundamental chemical and physical properties with natural diamonds, but their geological origin is completely different. This origin affects retail valuations, replacement insurance coverage, and the second-hand resale market.
CIBJO (World Jewellery Confederation) publishes internationally recognised jewellery nomenclature standards in its Blue Books. Voluntarily followed across the global supply chain, these rules are updated regularly. Sellers in the UK must also check CAP and ASA rules to ensure compliance under active advertising policies.
Are they fake or imitation? No. Simulants like moissanite and cubic zirconia are different crystalline substances with unique compositions. A laboratory-grown diamond is genuine diamond crystal grew through CVD/HPHT methods, but its artificial origin must remain clear to prevent buyer confusion.
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CIBJO standards require transparent terminology to distinguish lab-grown diamonds from natural ones.
2. Where Disclosures Must Appear
Disclosure should follow the product throughout the entire customer journey:
- Search & Social Ads: Visible text, copy, or landing pages must clearly identify lab-grown origin rather than hiding behind generic tags.
- Product Pages & Titles: Titles like 1.00 ct Laboratory-Grown Diamond Pendant are accurate, whereas 1 Carat Real Diamond is misleading.
- Checkouts & Invoices: Baskets, email confirmations, receipts, and warranty logs must preserve full origin disclosures.
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Titles and descriptions must consistently state origin across catalogs, baskets, and receipts.
3. Environmental claims and grading nomenclature
Carats & Settings: Carat weights should clarify centre-stone mass versus total carat weights (TCW). Precious metals (gold fineness, platinum 950) should be explicitly detailed alongside coloured accents.
Certifications: Clearly state which independent lab (GIA, IGI) issued grading reports. Make sure report numbers correspond directly to girdle laser inscriptions.
Green & Eco Claims: General phrases like "completely sustainable" require complete lifecycle evidence. Precise claims (e.g. "100% renewable electricity at the growth facility") are preferred.
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A loose-stone grading report should match the girdle laser registration code exactly.
Product Page template for Aurelia Royale
The following structure ensures compliance and visual elegance across our web pages:
Template Structure
Lab-Grown Diamond Disclosure Checklist
| Ensure transparent checkout details: |
|---|
| Clear lab-grown descriptors are visible on titles, ads, and baskets. |
| Individual carat weights are separated clearly from total combined weights. |
| Metal types, purity levels, and hallmarking processes are specified. |
| Independent laboratory reports (GIA, IGI) are named and verifiable. |
| Any post-growth treatments are disclosed on invoices. |
| All environmental or ethical claims are precise and backed by evidence. |
Final Verdict
Frequently Asked Questions
Must a lab-grown diamond be labelled as lab-grown?▼
Yes. Its laboratory-grown origin should be disclosed prominently wherever it is advertised or sold. The word “diamond” should not be used in isolation in a way that could confuse buyers about origin.
Can a lab-grown diamond be called a real diamond?▼
Lab-grown diamonds have the essential properties of diamond, but “real diamond” can be confusing if the laboratory-grown origin is not equally prominent. “Laboratory-grown diamond” is clearer.
Is laboratory-created diamond acceptable terminology?▼
It is clear terminology because it directly communicates the diamond’s laboratory origin. Requirements can vary by country and advertising channel, so retailers should check current local guidance.
Is a lab-grown diamond a synthetic diamond?▼
“Synthetic diamond” is used in technical and regulatory contexts, but some consumers incorrectly interpret “synthetic” as meaning a simulant. Consumer descriptions should explain clearly that the product is a laboratory-grown diamond.
Can a lab-grown diamond be called a cultured diamond?▼
“Cultured diamond” should not be used by itself because its meaning may not be clear to every buyer. If used at all, it should be accompanied immediately by an unambiguous laboratory-grown description.
Should CVD or HPHT be disclosed?▼
The growth method should be provided when it is known and verified. It can help customers understand the product, although it does not determine the diamond’s quality by itself.
Must post-growth treatment be disclosed?▼
Known treatments should be disclosed accurately, particularly when they are stated in the grading report or materially affect how the diamond is represented.
What does total carat weight mean?▼
Total carat weight is the combined weight of all relevant diamonds in the piece. It is not necessarily the weight of each individual diamond.
Does a grading report certify the complete jewellery piece?▼
Usually not. A diamond grading report commonly evaluates a loose or identifiable diamond. It may not evaluate the setting, precious metal, craftsmanship or smaller accent stones.
Can lab-grown diamonds be described as sustainable?▼
Only when the claim is defined, qualified and supported with suitable evidence. A claim about renewable electricity at a growing facility does not automatically cover the entire jewellery lifecycle.
Should lab-grown origin appear on an invoice?▼
Yes. Consistent disclosure on invoices, confirmations and accompanying documents helps preserve accurate product information after purchase.
Must lab-grown origin be disclosed when jewellery is resold?▼
Yes. The laboratory-grown origin remains material information and should be stated clearly in a resale listing.
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Independent certifications, clear technical growth methods, and legal metal hallmarks are guaranteed on all purchases.
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