Are Lab Grown Diamonds Real?
Yes, lab grown diamonds are real diamonds. They have diamond’s carbon crystal structure and nearly the same chemical, physical and optical properties as natural diamonds. “Laboratory-grown” describes their production origin. GIA’s explanation of laboratory-grown diamonds.
A laboratory-grown diamond therefore has a different origin from a naturally formed diamond. Understanding that distinction helps you ask a more precise question when buying: is this stone diamond, and how was it produced?
The answer should come from clear product information and appropriate identification. A photograph, an impressive sparkle or the word “certified” on its own leaves questions unanswered.
Diamond identity, origin and quality are separate questions
The word “real” can blur together several things a buyer wants to know. Separating them makes a seller’s explanation easier to assess.
| Question | What it concerns | What the answer establishes |
|---|---|---|
| Is this stone diamond? | Material identity | Whether the material is diamond or another substance |
| Is it natural or laboratory-grown? | Production origin | Whether the diamond formed naturally or through laboratory production |
| What quality is this diamond? | Individual characteristics | The assessment of the particular stone, including the characteristics covered by its report |
Laboratory-grown diamonds can differ in quality. For example, two stones with the same carat weight can have different colour, clarity and cutting characteristics. Identifying both as diamond does not make their individual assessments interchangeable. IGI’s laboratory-grown diamond report guidance.
If naturally formed origin is important to you, ask for that explicitly. Our lab grown versus natural diamond comparison explores the wider differences between those choices.
What do laboratory-grown, synthetic and simulated mean?
“Laboratory-grown diamond” and “laboratory-created diamond” describe the same category of material. In gemmological terminology, “synthetic diamond” also refers to laboratory-produced diamond. CIBJO’s 2021 guidance identifies these three terms as synonymous. CIBJO’s laboratory-grown diamond terminology guidance.
“Simulated diamond” has a different meaning. A diamond simulant resembles diamond but is another material. Moissanite and cubic zirconia are examples; their material properties differ from diamond’s. GIA’s guide to diamond simulants.
A listing that says only “lab-created stone” needs clarification. Ask the seller to name the gemstone. Laboratory production alone does not tell you which material you are being offered.
Likewise, choosing moissanite can be an informed preference. The purchase description should accurately identify it. Our lab grown diamonds versus moissanite guide explains that material comparison.
How can a laboratory produce diamond?
The two main growth methods are high pressure, high temperature, known as HPHT, and chemical vapour deposition, known as CVD.
HPHT uses intense pressure and heat to grow diamond. CVD uses a carbon-containing gas to grow diamond on a seed. Both methods produce diamond crystals, although their growth processes differ. GIA’s explanation of diamond growth methods.
These method names explain production. They should be considered alongside the information about the individual stone when reviewing a purchase.
For a fuller introduction to production and diamond terminology, visit our lab grown diamond education guide.
Can appearance or a diamond tester prove the origin?
Laboratory-grown and natural diamonds can look very similar. Ordinary visual inspection cannot reliably establish their origin; specialist identification uses equipment and expertise suited to that task. GIA’s explanation of diamond identification.
You can use photographs and videos to assess whether a stone’s appearance appeals to you. Treat its material identity and origin as separate matters requiring supporting evidence.
A basic thermal diamond tester does not establish natural origin. Some thermal testers can also respond to moissanite because it conducts heat well. Consequently, a positive response alone is insufficient to resolve every identification question. GIA’s discussion of identification methods, GIA’s research on moissanite testing.
When someone demonstrates a tester, ask what that instrument is designed to determine. For the detailed explanation, read our guide to lab grown diamonds and diamond testers.
What can a laboratory report confirm?
An appropriate independent laboratory report documents the stone examined and identifies its laboratory-grown origin. The additional quality information depends on the laboratory and service used. IGI’s explanation of laboratory-grown diamond reports.
Report formats can differ. GIA’s current quality assessment for eligible colourless to near-colourless laboratory-grown diamonds uses Premium and Standard categories. Its laboratory-grown coloured diamond services use separate report formats. GIA’s current laboratory-grown diamond services.
Read the document’s title, issuer, date and origin description before interpreting its quality information. The laboratory name alone does not explain everything the document covers.
Our IGI report guide and GIA report guide explain their respective documents in more detail.
Match the report to the stone being offered
Checking a report number on the issuing laboratory’s website is a useful starting point. You should also establish that the report belongs to the physical stone you are considering.
This distinction matters because a genuine report number can be copied. GIA has documented moissanite carrying a fraudulent inscription corresponding to a natural diamond’s report. Differences between the stone and the report, together with laboratory examination, revealed the mismatch. GIA’s documented inscription case.
Ask the jeweller how the stone has been matched to its documentation. Relevant checks may include its measurements, recorded characteristics and any inscription. An inscription should form part of that assessment.
If you are reviewing an existing piece with uncertain documentation, explain what information you have and ask which identification service is appropriate. A photograph of the jewellery may help describe the piece, but it cannot replace examination of the stone.
Does being a real diamond guarantee a beautiful stone?
Diamond identity answers a material question. Appearance still deserves separate attention.
Cutting and proportions influence how a diamond interacts with light. Brightness, coloured fire and the changing sparkle seen as a stone moves are aspects of its appearance. GIA’s diamond cut guidance.
Once identity and origin are established, compare the actual stones in suitable lighting and review the available quality information. Consider which appearance you prefer and whether the dimensions suit the intended jewellery.
For that next stage, our loose lab grown diamond buying guide explains how to assess individual options.
Frequently asked questions
Is a synthetic diamond the same as a simulated diamond?
No. “Synthetic diamond” is a gemmological term for laboratory-grown diamond. A simulated diamond is another material used to resemble diamond. Check the full gemstone description when the wording is unclear. CIBJO’s terminology guidance, GIA’s simulant guide.
Are CVD and HPHT diamonds both real diamonds?
Yes. CVD and HPHT are different methods of growing diamond. Neither method name, by itself, establishes the finished stone’s quality. GIA’s explanation of laboratory-grown diamond production.
Can a jeweller identify laboratory-grown origin with a loupe?
A loupe examination alone cannot reliably establish origin for every diamond. Specialist equipment or laboratory examination may be needed. GIA’s diamond identification guidance.
Does a missing report mean the stone is fake?
A missing report means you lack that documentation; it does not, by itself, identify the material. Ask for appropriate examination if identity or origin is uncertain. A laboratory report records the findings of the assessment performed. IGI’s report guidance.
Does a laboratory-grown centre stone mean all the smaller stones are laboratory-grown?
The centre stone’s description alone does not establish the identity or origin of the surrounding stones. Ask what the documentation covers. A loose-stone report and a finished-jewellery report have different scopes. IGI’s explanation of laboratory-grown diamond and jewellery reports.
Discuss your laboratory-grown diamond requirements
If you are considering a laboratory-grown diamond, contact Uniglo Diamonds with your preferred shape, approximate size and intended jewellery piece.
Ask to review the origin description, specifications and available laboratory documentation for the particular stones being discussed. This gives you a clear basis for assessing both what the diamond is and whether it suits your requirements.
