Quick answer: Lab-grown and natural diamonds are the same material: pure carbon with identical hardness, sparkle and chemistry. In 2026, a lab-grown diamond costs a small fraction of a comparable natural one. That makes it the better choice if you want a bigger, whiter stone for your budget. Choose natural if rarity, heritage or long-term resale matters most to you.
Choosing a diamond in 2026 looks very different from even a year ago. Lab-grown prices have kept falling. The biggest grading lab changed how it reports lab-grown stones. And the world's best-known natural diamond producer has left lab-grown jewellery altogether.
This guide explains what those changes mean for you. It covers price, value, certification and ethics, then helps you decide which diamond fits your ring, your budget and your priorities.
What are lab-grown and natural diamonds?
Natural diamonds
Natural diamonds formed 1 to 3 billion years ago, 150 to 200 km below the Earth's surface, under extreme heat and pressure. Volcanic activity carried them up, and today they are mined in countries such as Botswana, Russia, Canada, Angola and Australia. Each one carries tiny traces of its geological history, which is how labs tell them apart.
Lab-grown diamonds
Lab-grown diamonds are real diamonds made above ground, usually in a few weeks. Two methods are used:
- CVD (chemical vapour deposition): carbon-rich gas is broken down so carbon atoms settle, layer by layer, on a thin diamond seed. India, especially Surat, is one of the world's largest CVD producers.
- HPHT (high pressure, high temperature): a press recreates the conditions deep inside the Earth to crystallise carbon around a seed.
Both methods produce crystalline carbon with the same hardness (10 on the Mohs scale), refractive index and fire as a mined diamond. In the US, the Federal Trade Commission has recognised lab-grown stones as diamonds since 2018, as long as their origin is clearly disclosed.
Not the same as simulants: Moissanite, cubic zirconia and white sapphire only look like diamonds. They are different materials with different hardness and sparkle. See our lab-grown diamonds vs moissanite guide
Lab-grown vs natural diamonds: side-by-side comparison
|
Factor |
Lab-grown diamond |
Natural diamond |
|---|---|---|
|
Composition |
Pure carbon, same crystal structure |
Pure carbon, same crystal structure |
|
Hardness and durability |
10 on the Mohs scale, lasts a lifetime |
10 on the Mohs scale, lasts a lifetime |
|
Look and sparkle |
Identical to the naked eye and under a jeweller's loupe |
Identical to the naked eye and under a jeweller's loupe |
|
Price (same size and quality) |
Usually 80–90%+ less than natural [verify] |
Premium price driven by rarity |
|
Size for the same budget |
Often 2–4x the carat weight |
Smaller stone for the same spend |
|
Resale value |
Low on the open market; brand buyback or exchange matters |
Partial resale value, strongest for rare, high-quality stones |
|
Certification |
IGI (full 4Cs grading); GIA (simplified lab-grown report) |
GIA, IGI and others, full 4Cs grading |
|
Origin |
Traceable to a specific facility |
Traceable in varying degrees, depending on the supply chain |
|
Environmental footprint |
No mining; impact depends on the energy used to grow it |
Mining disturbs land; impact varies widely by mine |
|
Emotional value |
Modern, conscious, design-led |
Rarity, heritage, billions of years old |
The bottom line: on the finger, nobody can tell them apart. The real differences are price, long-term value and what the stone's story means to you.
What's changed since 2025
The diamond market has shifted more in the past 18 months than in the five years before. These are the changes that matter to buyers:
|
When |
What happened |
What it means for you |
|---|---|---|
|
Sep 2026 |
India's Union Home Minister Amit Shah said India should control the entire lab-grown value chain, from machines to retail |
More policy support for Indian-grown, Indian-branded lab diamonds |
|
Sep 2026 |
The Natural Diamond Council rebranded as The Diamond Collective, focusing on clearly separating natural from lab-grown |
Natural diamonds are being marketed as a distinct rarity category, not a direct rival |
|
2025–26 |
US tariffs on Indian goods have moved several times, and the jewellery trade is lobbying for diamond exemptions |
Mainly affects export pricing; buyers in India are largely unaffected |
|
Late 2025 |
GIA started issuing simplified lab-grown reports that use broad quality descriptors instead of full colour and clarity grades |
IGI remains the standard for a full 4Cs lab-grown grade |
|
2025 |
De Beers announced it would wind down Lightbox, its lab-grown jewellery brand, and refocus on natural diamonds |
The industry now treats lab-grown and natural as separate markets with different value logic |
|
2024–26 |
Lab-grown prices kept falling as growing capacity expanded, especially in India and China |
Better value than ever, and a clear sign that lab-grown is not an investment |
The takeaway: lab-grown diamonds are now priced as beautiful, affordable jewellery, and natural diamonds are sold on rarity. Both are legitimate choices. They just deliver different kinds of value.
Resale and value in 2026
Resale: be realistic
No diamond is a guaranteed investment, and it helps to be honest about that.
- Natural diamonds usually resell for well below retail, often 30–60% of the purchase price. Rare stones (large, top colour, fancy colours) hold value best.
- Lab-grown diamonds have very little resale value on the open market, because supply keeps growing and prices keep falling.
- Brand programmes matter most for lab-grown. At Aupulent, our lifetime exchange and buyback policy lets you upgrade or return your piece on clear terms. This is value the open market won't give you.
Our view: buy a diamond for how it makes you feel every day you wear it, not as a financial asset. If long-term value is your main concern, a natural diamond with a GIA report is the more defensible choice.
Ethics, sustainability and certification
Is lab-grown more ethical?
Lab-grown diamonds involve no mining. Every stone can be traced to the facility that grew it, which removes the risk of conflict diamonds. The natural diamond trade has improved too, with the Kimberley Process, mine-to-market tracing and community programmes in producing countries such as Botswana.
Is lab-grown better for the planet?
It depends on the energy used. Growing diamonds takes a lot of electricity, so a stone grown on renewable power has a much lower footprint than one grown on coal-heavy power. Be wary of blanket "eco-friendly" claims. Ask your jeweller where and how the stone was grown. IGI vs GIA: which certificate should you look for?
- IGI grades lab-grown diamonds on the full 4Cs (cut, colour, clarity, carat) and is the most widely used lab for lab-grown stones in India.
- GIA now issues a simplified lab-grown report with broad quality descriptors rather than exact colour and clarity grades . For natural diamonds, GIA remains the benchmark.
- Always check the laser inscription on the girdle matches the report number, and that the report clearly states "laboratory-grown".
Every Aupulent lab-grown diamond comes with certification.
Which should you buy? A quick decision guide
|
If this matters most to you… |
Choose |
|---|---|
|
A bigger or better-quality stone for your budget |
Lab-grown |
|
An engagement ring that looks exceptional without overspending |
Lab-grown |
|
Everyday pieces such as tennis bracelets, studs and bands |
Lab-grown |
|
Clear, traceable origin with no mining |
Lab-grown |
|
Rarity and a stone formed over billions of years |
Natural |
|
An heirloom meant to pass through generations |
Natural |
|
Some chance of resale value later |
Natural (GIA certified) |
|
Family or cultural tradition that calls for a mined diamond |
Natural |
Still unsure? Many couples now mix both: a lab-grown centre stone for size and impact, and a family heirloom stone or natural accents set around it.
Find your diamond at Aupulent
Explore our IGI-certified lab-grown diamonds in engagement rings, wedding bands, earrings and tennis bracelets Every piece is backed by our lifetime exchange and buyback policy.
[Explore Lab-Grown Diamond Collections →] · [Book a free consultation →]
Frequently asked questions
Are lab-grown diamonds real diamonds? Yes. They have the same chemical composition, crystal structure, hardness and sparkle as mined diamonds. Only their origin differs, and certificates must state that they are laboratory-grown.
Can a jeweller tell the difference between lab-grown and natural? Not by eye or with a loupe. Only specialised lab equipment can identify the growth method. That is why certification and the laser inscription on the girdle matter.
Do lab-grown diamonds hold their value? Not on the open resale market, because prices keep falling as production grows. The best protection is a jeweller's exchange or buyback policy, such as Aupulent's lifetime programme.
Are lab-grown diamonds good for engagement rings? Yes. They are just as durable for everyday wear, and they let you choose a larger or higher-quality centre stone for the same budget. That's why lab-grown is now a mainstream engagement ring choice.
Is IGI or GIA better for lab-grown diamonds? For lab-grown stones, IGI gives a full 4Cs grade and is the most common choice. GIA now gives lab-grown diamonds a simplified report. For natural diamonds, GIA is the benchmark.
Will lab-grown diamond prices keep falling? Most industry observers expect prices to keep easing as capacity grows, though more slowly than in 2022–24. If you love the stone, the price you pay today buys you years of wear. Waiting rarely makes sense for a ring you want now.
