Are Lab Grown Diamonds Fake

Are Lab Grown Diamonds Fake? An Honest Guide for Buyers

If you have spent even an hour researching diamond jewellery, you have probably run into the same confusing question: are lab grown diamonds fake, or are they real? You read one article that says they are 100% real diamonds. You read another that calls them "synthetic" or warns about a "scam." A relative tells you they are just "American diamonds." A jeweller in Zaveri Bazaar shrugs and says, "Madam, asli wahi hota hai jo zameen se aaye."

So which one is the truth?

Here is the short, honest answer before we go deeper:

Lab grown diamonds are not fake. They are real diamonds; chemically, physically and optically identical to mined ones. The actual "fake" diamonds are simulants like cubic zirconia (American diamond), which are completely different stones that only look like diamonds.

That single line settles the science. But because the question keeps coming back in forums, in family WhatsApp groups, and in showrooms across Surat, Ahmedabad, Mumbai and Delhi, it deserves a proper, no-nonsense explanation. This post is for the buyer who wants to understand what they are paying for, not be talked into something.

Where the "fake diamond" confusion actually comes from

A lot of the doubt around lab grown diamonds is not really about science. It is about three things mixing together:

  1. Loose vocabulary: People casually use words like "fake," "artificial," "synthetic," "man-made" and "lab grown" as if they all mean the same thing. They do not. A simulant is fake. A lab grown diamond is real. Mining a diamond from the earth is one origin; growing it in a controlled chamber is another. Origin is not the same as identity.
  2. Older retail incentive: Traditional jewellers built their entire business on natural-diamond margins. When a stone that looks the same, and grades the same on IGI reports, sells for a fraction of the price, the most convenient counter-argument is to call it "fake." It is a sales tactic, not a fact.
  3. A few real scams: There have been cases globally where people tried to pass off lab grown diamonds as natural ones at natural-diamond prices, or where Instagram sellers offered "1-carat diamonds for ₹15,000" with no certification at all. These are real frauds. But the fraud is in the misrepresentation, not in the lab grown diamond itself.

Once you separate these three things, the picture clears up quickly.

What makes a diamond a "real" diamond?

A diamond is defined by its chemistry and structure, not by its address.

Specifically, a diamond is pure carbon arranged in a cubic crystal lattice, formed under intense heat and pressure. That is the definition gemological labs, the FTC in the US, and Indian certification bodies all work with.

A natural diamond gets formed deep in the earth's mantle over a billion-plus years. A lab grown diamond gets formed inside a sealed reactor in a laboratory in Surat, Mumbai or another diamond hub, using one of two methods:

  • HPHT (High Pressure, High Temperature), which mimics the earth's mantle conditions inside a press.
  • CVD (Chemical Vapour Deposition), which builds the diamond atom by atom from a carbon-rich gas in a vacuum chamber.

Both processes start with a tiny seed of diamond. Both grow real diamond crystals. The finished stone has:

  • The same hardness, 10 on the Mohs scale.
  • The same refractive index, meaning the same sparkle and fire.
  • The same density and thermal conductivity.
  • The same response to a standard diamond tester at the jeweller's counter.

If you handed a polished lab grown diamond to a gemologist without telling them where it came from, they would need specialised lab equipment, not the naked eye, not a jeweller's loupe, not a regular thermal probe, to identify its origin. That is the level of "real" we are talking about.

So what are the actual fake diamonds?

This is the part most buyers are never told clearly. There is a category of stones called diamond simulants. They are designed to look like a diamond without being one. The two most common in Indian jewellery are:

Cubic Zirconia (CZ), popularly sold in India as "American diamond." Chemically it is zirconium dioxide, not carbon at all. It scores around 8 to 8.5 on the Mohs scale, scratches easily, loses brilliance over time and shows much more rainbow flash than a real diamond. CZ is what your imitation jewellery from Karol Bagh or any street market is made of.

Moissanite, silicon carbide. It is harder than CZ but still not a diamond. It sparkles more aggressively (a "disco-ball" effect under bright light) because it is doubly refractive. Some sellers promote it as a "diamond alternative," which is fair, but anyone selling moissanite as a "lab diamond" is misleading you.

Glass, white sapphire, and paste stones are softer, duller, and very much not diamonds.

These are the real fakes. A lab grown diamond does not belong on this list. Putting it there is like calling a baby born through IVF a "fake baby" because the conception happened in a different setting. The biology is the same.

How to verify a lab grown diamond is genuine (and not a simulant)

This is the practical part. If you are buying lab grown diamond jewellery in India, these are the checks that actually matter, far more than any opinion from a relative or a YouTube video.

  1. Insist on a certificate from a recognised lab: The most credible certifications for lab grown diamonds in the Indian market are IGI (International Gemological Institute) and SGL (Solitaire Gemological Laboratories), with GIA also grading lab grown stones since 2020. IGI in particular has the deepest infrastructure in India and has been grading lab grown diamonds on the full 4C scale longer than any other major lab. A certificate confirms the stone is a real diamond, identifies its origin (lab grown vs natural), and grades it on cut, colour, clarity and carat.
  2. Match the laser inscription to the certificate: Every certified lab grown diamond above a certain size carries a tiny laser inscription on its girdle, a unique serial number tied to its grading report. You can verify this number on the lab's official website. If a seller cannot show you both the certificate and the inscription, walk away.
  3. Check the gold for BIS hallmarking. A real diamond set in a fake gold setting is still a problem. The BIS hallmark on the metal, 14K, 18K, 22K, confirms the gold purity independently.
  4. Be wary of "too cheap to be true" deals: If everyone in the market is pricing a 1-carat VS-clarity lab grown diamond ring around ₹40,000–₹70,000, and an Instagram page is offering one for ₹12,000, the math is telling you something. Either the certification is forged, the stone is a simulant being sold as a lab grown diamond, or the gold is below stated purity. Trust the market, not the bargain.
  5. Buy from a brand with a physical address and a real return policy: This is the single biggest protection an Indian buyer has. A jeweller with a registered store you can walk into, a website that lists its certifications openly, and a stated buyback or exchange policy is dramatically less likely to defraud you than an anonymous reseller.

This last point is precisely why brands like AYAANI have gained ground with younger Indian buyers, every piece comes with SGL or IGI certification, the gold is BIS hallmarked, the diamonds are produced through CVD and HPHT methods, and the brand maintains physical stores across Ahmedabad, Surat, Delhi, Chandigarh, Raipur, Jodhpur and Mathura. You can walk in, hold the piece, ask to see the certificate before you pay. That kind of transparency removes most of the anxiety the word "lab grown" creates.

The concerns Indian buyers actually raise

Forum threads, Quora answers, and showroom conversations across Indian metros surface the same handful of worries. Worth addressing each one directly.

"Will my family or in-laws be able to tell?" No. Not by looking, not by a regular diamond tester, not by holding it under any normal household light. The only way to identify a lab grown diamond as lab grown is through specialised spectroscopic equipment at a gemological lab. To every guest at every wedding, it is simply a beautiful diamond.

"Are they okay for weddings, engagement rings, mangalsutras, streedhan?" The stone itself is a real diamond. The gold or platinum it is set in is real metal with a hallmark. There is nothing about a lab grown diamond that makes it less suitable for any traditional Indian occasion. The only consideration is personal and cultural; some families place sentimental weight on the idea of a diamond that took a billion years to form. That is a values question, not a quality question.

"What about resale value?" This is the most legitimate critique of lab grown diamonds, and it deserves an honest answer rather than a sales pitch. The resale market for lab grown diamonds in India is still developing. If you take a lab grown diamond ring to a random jeweller in five years, they may offer very little, sometimes nothing, for the stone, and pay you mostly for the gold value. Two things help here:

  • Choose a brand that offers a published lifetime exchange or buyback policy in writing. AYAANI, for instance, runs a lifetime exchange and buyback programme that lets you upgrade or trade in your piece against new purchases, which is the real-world equivalent of resale value for jewellery you actually wear.
  • Reframe the purchase. If you spend ₹50,000 on a lab grown diamond solitaire that would have cost ₹3,00,000 as a natural diamond, you have already "saved" the resale-value gap upfront. Lab grown diamonds make sense as jewellery to wear, not as investments. Even natural diamonds, by the way, are not great financial investments outside of fancy-coloured stones.

"Do they lose their sparkle over time? Do they get cloudy?" No. A diamond is a diamond. Lab grown diamonds do not yellow, cloud, scratch easily, or lose brilliance over time. They will collect the same skin oils, lotion residue and dust as any other ring, and a quick clean with mild soap and warm water restores them. There is no degradation built into a real diamond, regardless of where it grew.

"Why are they so much cheaper if they are real?" Because they took weeks to grow instead of a billion years, and because the natural diamond market is artificially supply-controlled while lab grown diamonds are produced at scale, heavily in Surat, which alone accounts for the vast majority of India's lab grown diamond output. When supply is abundant and the production timeline is short, the price drops. The stone itself is no less real.

Where AYAANI fits into all this

The Indian lab grown diamond market has gone from a niche curiosity five years ago to a serious, fast-growing category in 2026, with new stores opening across tier-2 cities, prices stabilising, and certifications becoming standard. In that landscape, the brands worth paying attention to are the ones treating lab grown diamonds the way a serious jeweller treats any diamond: with proper grading, transparent sourcing, real after-sales service, and designs you would actually want to wear every day.

That is the niche AYAANI has built itself around. Rather than competing on heavy bridal pieces alone, the brand focuses on daily-wear, minimal, lightweight lab grown diamond jewellery, the kind you can put on with office wear, with a kurta, with denim. The collection covers solitaires, engagement and couple rings, dainty pendants, classic studs, hoops, bracelets and statement necklaces, available in 9K, 14K and 18K gold across rose, white and yellow shades.

What makes the brand answer the "are lab grown diamonds fake" question well, in practice, is the documentation. Every piece is SGL or IGI certified. The gold is BIS hallmarked. The diamonds are produced through both CVD and HPHT methods. There is a lifetime exchange and buyback option, a 7-day return policy, free resizing and cleaning, and physical showrooms in Ahmedabad, Surat, Delhi, Chandigarh, Raipur, Jodhpur and Mathura, so you can verify everything in person before you commit.

If you are looking at lab grown diamond jewellery for the first time and you want a brand that does not ask you to take its word for anything, AYAANI is a sensible place to start the conversation.

A short, honest summary

  • Lab grown diamonds are real diamonds. They are not fake, not synthetic in the imitation sense, not "American diamonds," not CZ, not moissanite.
  • The actual fake diamonds are simulants, cubic zirconia, moissanite, glass, white sapphire, which are different stones altogether.
  • A certified lab grown diamond from a reputable lab (IGI, SGL, GIA) carries the same chemistry, hardness and sparkle as a mined diamond, at a fraction of the price.
  • The only legitimate trade-off is resale liquidity, which is best handled by buying from a brand that offers a written buyback or exchange policy.
  • The fastest way to avoid being scammed is the boring way: buy from a registered brand with certified stones, hallmarked gold, physical stores, and a real return policy. Skip the "too good to be true" Instagram offers.

The next time someone tells you lab grown diamonds are fake, you can answer with confidence: the stone is real, the certification is real, the sparkle is real. The only thing that is fake is the myth.

FAQs

  1. Will a diamond tester say your lab grown diamond is real?
    Yes. Standard thermal and electrical diamond testers used at jewellery counters confirm a lab grown diamond as a diamond. Distinguishing lab grown from natural requires specialised lab equipment.
  2. Is IGI or SGL certification reliable in India?
    Both are reliable for lab grown diamonds. IGI is the global leader in lab grown grading and has extensive operations in India. SGL is widely used domestically. Both are independent third-party labs and their reports can be verified online with the report number and laser inscription.
  3. Are lab grown diamonds eco-friendly?
    They avoid the land-use and labour issues associated with mining. Their environmental footprint depends on the energy source used by the producer, labs running on renewable energy are genuinely low-impact, while those on conventional grids are less so. It is fair to call most lab grown diamonds more sustainable than mined ones, but not automatically zero-impact.
  4. Can you wear a lab grown diamond ring for an engagement?
    Absolutely. It is a real diamond, certified, hallmarked and durable for a lifetime of daily wear. Many Indian couples in 2026 are choosing lab grown diamonds precisely because they get a noticeably larger or higher-quality stone within the same budget.
  5. What size lab grown diamond can you get for ₹1 lakh in India?
    Roughly speaking, a well-cut 1-carat lab grown solitaire in good colour and clarity sits in the ₹40,000–₹70,000 range for the stone itself, with the final price depending on the gold weight and design of the setting. A ₹1 lakh budget can comfortably get you a 1-carat solitaire ring or a substantial pair of solitaire studs from a reputable brand, territory that would have required several lakhs in the natural-diamond market.
  6. Do lab grown diamonds have any disadvantages?
    The main one is resale liquidity in the open market, which is why a brand-backed buyback or exchange policy matters. Beyond that, the disadvantages people cite are usually emotional preferences for natural origin rather than practical drawbacks of the stone itself.
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