Yes, and here is why
A lab-grown diamond is a real diamond. "Real" in gemmology is about material, not origin. A diamond is pure carbon crystallised in a specific cubic structure. When carbon atoms bond that way, the result is a diamond, with a diamond's hardness, brilliance and thermal conductivity. That happens whether the crystal grows deep underground or in a laboratory chamber.
The confusion usually comes from mixing up three different things: natural diamonds, lab-grown diamonds and diamond simulants. Only the first two are diamonds.
Diamonds vs simulants
A simulant is a different material that imitates the look of diamond:
- Cubic zirconia is a synthetic zirconium oxide. It is softer than diamond and, over time, it can scratch and look dull.
- Moissanite is silicon carbide. It is very hard and very brilliant, but it shows more coloured "fire" than diamond and has different optical properties, including double refraction.
- Glass and crystal are much softer, and they show wear quickly.
A lab-grown diamond is not one of these. It is not an imitation of diamond. It is diamond.
How lab-grown diamonds are made
There are two established methods:
HPHT (high pressure, high temperature)
A small diamond seed is placed with carbon in a press that creates pressure and heat similar to conditions deep in the earth. The carbon dissolves and crystallises onto the seed.
CVD (chemical vapour deposition)
A diamond seed plate sits in a vacuum chamber filled with carbon-containing gas. Energy breaks the gas apart, and carbon atoms settle onto the seed, building the crystal layer by layer. Some CVD stones receive a post-growth treatment to improve colour, and a good grading report will note this where it is detected.
Neither method is "better" across the board. Both can produce stones of excellent quality. What matters is the finished stone's grades and how well it has been cut.
How grading labs treat lab-grown diamonds
Independent gemmological laboratories grade lab-grown diamonds on cut, colour, clarity and carat, just as they do natural diamonds. The report clearly states that the stone is laboratory-grown, and many labs also laser-inscribe the girdle with the report number and a lab-grown notation. That inscription is microscopic, invisible to the naked eye, and it is a useful way to match a stone to its report.
Our guide to reading a lab-grown diamond report explains each section, from measurements to fluorescence.
How regulators describe them
Consumer-protection guidance in the United States changed in 2018. The Federal Trade Commission's revised Jewelry Guides removed "natural" from its definition of diamond, recognising that a diamond is defined by its material. The same guidance requires sellers to disclose clearly that a stone is lab-grown, using terms such as "laboratory-grown", "laboratory-created" or "[manufacturer]-created". Wording elsewhere differs by country. The principle is the same everywhere: a lab-grown diamond is a diamond, and its origin must be disclosed.
Can you tell the difference by eye?
No. A trained gemmologist cannot reliably tell a lab-grown diamond from a natural one by eye or with a standard loupe. Identification needs specialist laboratory instruments that examine growth patterns and trace elements. Standard handheld "diamond testers" that measure thermal conductivity will identify both as diamond.
Why "real" still needs honesty
Because lab-grown and natural diamonds look the same, clear disclosure matters. When you buy, look for:
- Clear labelling of the stone as lab-grown on the product page, the invoice and the grading report.
- A grading report for the centre stone where one applies.
- A seller who explains resale honestly. Lab-grown diamonds have low and uncertain resale value. That does not make them less real, but it is important to know.
What it means for your engagement ring
A lab-grown diamond engagement ring will look, feel and wear like any diamond ring:
- It is equally hard and scratch-resistant for daily wear.
- It sparkles according to its cut, not its origin.
- It can be cleaned, re-polished and re-set like any diamond.
What it changes is the budget. For the same spend, you can usually choose a better-cut or larger stone, or put more into the setting.
How we work at STELLIVON
Every STELLIVON engagement ring is set with lab-grown diamonds, clearly disclosed as such. We select stones individually. Where a report applies, you see it before approving the design.
Your ring is approved twice before it is made: first as a hand-drawn line sketch, then as a CAD model built around the measurements of your actual stone. A 75% deposit begins the commission, and the balance is due after CAD approval. If you cancel before production, the deposit is refundable. Because every ring is made for one person, we do not accept returns after production. One size change is free (you cover shipping). A change of up to 2 Hong Kong sizes is possible but requires a new band, charged separately; your centre diamond is reused. Read the details in our Custom Order Terms.
A brief history of lab-grown diamonds
Diamond growth in the laboratory is not new. Researchers produced the first reproducible synthetic diamonds in the 1950s using high-pressure methods, and those early stones were small and mainly used in industry: cutting, drilling and polishing tools that rely on diamond's hardness. Over the following decades, both HPHT and CVD techniques improved enough to grow stones of gem quality, large and clear enough to be cut and set in jewellery.
That history matters because it shows that lab-grown diamond is a mature, well-understood material. It is not a recent novelty. The science that makes it possible is the same science that confirms it is diamond.
Myths worth clearing up
- "Lab-grown diamonds are not as hard." They have the same hardness, 10 on the Mohs scale.
- "They look different." At the same grades, they look the same. Cut quality makes the visible difference.
- "They change colour over time." A diamond's colour is stable whether grown or mined. Treatments, where used, are disclosed on reputable reports.
- "They are all flawless." They come in a full range of clarity grades, and grading still matters.
- "They hold their value like natural diamonds." Resale value for lab-grown diamonds is low and uncertain. Buy one to wear, not to sell.
Questions to ask any seller
- Is the stone clearly disclosed as lab-grown on the invoice?
- Is there an independent grading report, and can I see it before I commit?
- Has the stone received any post-growth treatment?
- Can I see images or video of the actual stone?
- What are the deposit, return and resize terms?
Our quote checklist has more questions like these.
How to verify what you buy
You do not need lab equipment to buy confidently. You need documents and a seller who discloses clearly:
- Check the report number. Reputable grading labs let you look up a report online by its number.
- Look for the girdle inscription. Many lab-grown stones carry a microscopic laser inscription of the report number. A jeweller can show it to you under magnification.
- Read the invoice wording. It should say "laboratory-grown" or an equivalent term, not just "diamond".
- Keep everything together. Store the report, invoice and photos safely. They are also what an insurer will ask for. See our insurance guide.
Frequently asked questions
Are lab-grown diamonds the same as moissanite? No. Moissanite is silicon carbide, a different material. Lab-grown diamond is carbon, the same as natural diamond.
Will a lab-grown diamond pass a diamond tester? Yes. Standard thermal testers identify lab-grown diamonds as diamond, because they are.
Do lab-grown diamonds last forever? They are as durable as natural diamonds. Like any diamond, they can chip from a hard knock on a vulnerable edge, so a protective setting matters for active lifestyles.
Do they look "too perfect"? Lab-grown diamonds come in a full range of grades, including stones with natural-looking inclusions. Perfection is not automatic. Grading still matters.
Is a lab-grown diamond a good choice for an engagement ring? For many people, yes. It is a real diamond that can free up budget for design. Compare the two in our lab-grown vs natural guide.
Explore
Browse stones in the Diamond Library, see setting outlines in the Setting Gallery, or start your ring.