Lab-Grown Diamonds 101
Ten years ago, "lab-grown diamond" was a niche term with a lot of skepticism behind it. Today, they account for nearly half of all engagement-ring diamonds sold in the US. If you're wondering whether they are "real," whether they hold up, and whether the price advantage is as good as it sounds — this guide answers all of it without the marketing spin.
First, the one-sentence answer
Yes, lab-grown diamonds are real diamonds. Chemically, physically, optically — indistinguishable from diamonds pulled out of the earth. The only real difference is that they're grown above ground, in a controlled environment, in weeks rather than billions of years.
How they're made
There are two established methods. Both have been around for decades, both produce gem-quality stones, and both go through the same cutting, polishing, and grading process as mined diamonds.
HPHT — High Pressure, High Temperature
Recreates the geological conditions beneath the earth's mantle. A small diamond "seed" is placed in a chamber with a carbon source (typically graphite) and a metal catalyst, then subjected to extreme pressure (~5 GPa) and heat (~1500°C). Carbon atoms migrate to the seed and crystallise into diamond. A rough takes a few weeks to grow.
CVD — Chemical Vapor Deposition
A diamond seed plate is placed in a vacuum chamber. A carbon-rich gas (usually methane and hydrogen) is ionised into a plasma. Carbon atoms rain down onto the seed and build up the crystal, layer by layer, over several weeks. CVD gives producers more control over purity and colour.
Both methods produce gem-quality rough. It's cut, polished, and graded the same way. Many of the most famous lab-grown stones in fine jewelry are CVD-grown.
Are they chemically identical to mined diamonds?
Yes. Both are pure crystalline carbon with identical hardness (10 / 10 on the Mohs scale), identical refractive index (2.42), identical dispersion, and identical thermal conductivity.
The only way to tell them apart is with specialised gemological equipment (photoluminescence spectroscopy, UV fluorescence imaging) that detects the trace growth patterns unique to lab conditions. No jeweler, no loupe, and certainly no passerby can tell the difference. Even gemologists need lab equipment.
What the certificate tells you
Every reputable lab-grown diamond ships with a report from IGI (International Gemological Institute) or GIA (Gemological Institute of America). The certificate lists:
- Carat weight (exact, to 0.01ct)
- Cut grade (Excellent, Very Good, etc.)
- Colour grade (D to Z scale)
- Clarity grade (FL to I3)
- Measurements and proportions
- Polish and symmetry grades
- Any treatments
- "Laboratory Grown" stated explicitly
Many lab-grown diamonds are laser-inscribed on the girdle with their certificate number — invisible to the naked eye, but verifiable under 10x magnification. Every Elista diamond carries this inscription.
The price difference — and why
For the same cut, colour, clarity, and carat, a lab-grown diamond typically costs 30-40% less than a mined equivalent. The difference comes from the supply chain, not the stone. Mined diamonds pass through miners, distributors, middlemen, wholesalers, and retailers — each taking a margin. Lab-grown diamonds come from a producer straight to a cutter to a retailer.
What this means for you: a $10,000 mined-diamond engagement ring can become a $6,000-7,000 lab-grown ring with identical specs — or you can spend the same $10,000 and get a significantly larger or higher-quality stone.
Quality: it varies, just like mined
Not every lab-grown diamond is excellent. Just like mined, you'll find stones across every grade of the 4Cs. A poorly cut lab-grown diamond looks just as lifeless as a poorly cut mined one. The certificate is your source of truth — always ask for it before buying.
Environmental impact — let's be honest
Lab-grown is significantly less destructive than mining. One mined carat disturbs, on average, 100+ tonnes of earth, uses substantial water, and relies on heavy-machinery fuel.
Lab-grown uses a fraction of the land and water, but it does use significant electricity — and the footprint depends entirely on the lab's energy source. A lab running on coal power isn't dramatically cleaner than a well-run mine. A lab running on renewables is dramatically cleaner.
At Elista, we partner with labs that source renewable electricity wherever grid options allow. It's not perfect — but it's honest, and you can trace it.
Ethical sourcing
Mined diamonds can be ethical (the Kimberley Process certifies conflict-free origin), but tracing a specific stone from ground to ring is genuinely hard. Lab-grown is conflict-free by definition — there's no mining region, no labour dispute, no smuggling risk.
For buyers who care about provenance, lab-grown is the simpler answer.
What about resale value?
Honest answer: resale values for lab-grown diamonds are lower than mined, and both are a small fraction of retail. A diamond is not an investment asset — it's a piece of craftsmanship you wear. If resale is your goal, buy gold, not diamonds.
What lab-grown does give you is better value at purchase. You are paying for the stone, the setting, and the craftsmanship — not for mining scarcity pretending to be inherent value.
Do they last?
Yes. A diamond is the hardest natural mineral on earth, lab-grown or not. Your ring will outlast every phone, every car, every piece of furniture you'll ever own. Clean it every few months, get the setting checked annually, and it will look new in fifty years.
Why Elista only sells lab-grown
We wanted to build a brand we could explain without footnotes. Every diamond we sell: traceable origin, IGI or GIA certified, 30-40% better value, conflict-free by default. Our customers get a beautiful stone, a fair price, and a clear conscience — in one purchase.
That doesn't mean mined diamonds are bad. It means lab-grown lets us be the kind of jewelry brand we wanted to exist.
Ready to see what a lab-grown ring looks like?
Browse our engagement rings — every listing shows the stone's full certification. Book a free virtual appointment and we'll walk you through real stones side by side. Or read more about how we source and certify every diamond we sell.
Further reading: The 4Cs of Diamonds, Explained · How to Choose the Right Diamond Shape