Are Lab Grown Diamonds Real? The Truth Indian Buyers Need to Know (2026)
- nishalgems
- May 8
- 7 min read
If you've ever typed "are lab grown diamonds real?" into Google, you're not alone — millions of buyers around the world ask this every year before making one of the most important purchases of their lives. The answer is a definitive yes. Lab grown diamonds are 100% real diamonds. But the story behind that answer is fascinating, and understanding it will help you make a smarter, more confident buying decision in 2026.
In this complete guide, we break down the science, the comparisons, the certifications, and the honest pros and cons — so you can decide what's right for you.
What Makes a Diamond "Real"?
A diamond is defined by its chemistry — pure carbon atoms arranged in a cubic crystal structure called a diamond lattice. That's it. That is the entire definition of a diamond.
Lab grown diamonds are made of exactly this: pure carbon, in exactly the same crystal arrangement. They score a 10 on the Mohs hardness scale — the maximum possible. They have the same refractive index (2.42), the same thermal conductivity, and the same optical brilliance as diamonds pulled from the earth.
There is no scientific distinction between a lab grown diamond and a mined diamond. Even the world's most advanced gemological instruments cannot tell them apart without specialised testing.
How Are Lab Grown Diamonds Made?
Lab grown diamonds are created using two primary methods — both of which replicate the exact natural conditions that form diamonds deep inside the Earth.
Method 1: HPHT (High Pressure High Temperature)
This method mimics the geological process that forms natural diamonds. A diamond seed is placed inside a growth chamber where it is subjected to extreme pressure (around 1.5 million pounds per square inch) and temperatures exceeding 1,400°C. Carbon dissolves in a molten metal solution and crystallises around the seed over several days to weeks. The result is a diamond physically and chemically identical to a mined stone.\
Method 2: CVD (Chemical Vapour Deposition)
CVD is the most widely used modern technique. A thin diamond seed wafer is placed inside a vacuum chamber filled with carbon-rich gas (usually methane). The gas is activated by microwave energy, causing carbon atoms to deposit layer by layer onto the seed — building up a diamond atom by atom. CVD produces exceptional clarity and is highly controllable, making it the preferred method for gem-quality stones.
Both methods begin with a real diamond seed. Both end with a real diamond.
Lab Grown Diamond vs Natural Diamond: What's Actually Different?
Here is an honest, side-by-side look at what changes and what stays exactly the same.
Feature | Lab Grown Diamond | Natural (Mined) Diamond |
Chemical composition | Pure carbon (identical) | Pure carbon (identical) |
Hardness | 10 / Mohs (identical) | 10 / Mohs (identical) |
Brilliance / Sparkle | Identical | Identical |
Grading (4Cs) | Yes — IGI, GIA certified | Yes — IGI, GIA certified |
Origin | Laboratory (6–10 weeks) | Earth (1–3 billion years) |
Price | 40–70% less expensive | Higher retail price |
Environmental impact | Lower footprint | Significant mining disruption |
Resale value | As per market | As per market |
Conflict-free | Always | Varies by source |
The only meaningful difference is origin — where and how the diamond was formed. Everything you can see, touch, test, and wear is identical.
Are Lab Grown Diamonds Certified?
Yes — and this is one of the most important things to know. Reputable lab grown diamonds come with grading reports from the same institutions that certify mined diamonds. The two leading global certifiers are:
GIA (Gemological Institute of America) — the world's most trusted diamond grading authority. GIA grades lab grown diamonds on the same 4Cs scale: Cut, Colour, Clarity, and Carat weight.
IGI (International Gemological Institute) — now the most common certification for lab grown diamonds globally. IGI reports are widely accepted by jewellers and buyers worldwide.
Always ask for a GIA or IGI certificate when buying a lab grown diamond. A certificate proves the quality of the stone and confirms it is indeed a lab grown diamond — not a simulant like cubic zirconia or moissanite.
"A lab grown diamond is graded, certified, and sold by the exact same standards as a mined diamond. The certificate does not care where the stone came from — only how beautiful it is."
Lab Grown Diamond vs Cubic Zirconia vs Moissanite — What's the Difference?
This is one of the biggest points of confusion among buyers. Let's clear it up once and for all.
Cubic Zirconia (CZ) is made from zirconium oxide. It is not a diamond. It is softer (8.5 Mohs), loses sparkle quickly, and cannot be certified by GIA or IGI as a diamond. It's a very affordable simulant — it looks like a diamond but is a completely different material.
Moissanite is made from silicon carbide. It is also not a diamond. It has a higher refractive index than diamond, which gives it a more "rainbow" sparkle that trained eyes can detect. It is an excellent gemstone in its own right, but it is not a diamond.
Lab Grown Diamond is a diamond. Full stop. It is not in the same category as CZ or moissanite. It is the same material as a mined diamond, with the same chemical and physical properties, graded by the same labs, sold in the same settings.
If someone tells you a lab grown diamond is "just like cubic zirconia," they are factually incorrect.
Why Are Lab Grown Diamonds So Much Cheaper?
Lab grown diamonds are typically 40–70% less expensive than mined diamonds of equivalent quality. This is not because they are lower quality — it is purely because of supply chain differences.
Mining natural diamonds involves massive geological operations, heavy equipment, global logistics, and decades-old market structures controlled by a handful of major players. Lab grown diamonds remove almost all of that. They are produced in a controlled, scalable environment with consistent output and no mining costs.
What this means for buyers: your budget goes much further. A budget that might buy you a 0.5-carat mined diamond can often get you a 1.5-carat lab grown diamond of the same or better quality.
Are Lab Grown Diamonds Ethical and Eco-Friendly?
This is one of the main reasons younger buyers — particularly millennials and Gen Z — are choosing lab grown diamonds worldwide.
Traditional diamond mining has a documented history of environmental disruption: land disturbance, water usage, carbon emissions, and in some regions, human rights concerns. Lab grown diamonds have a significantly smaller footprint. They require no mining, no large-scale land disruption, and their production is increasingly powered by renewable energy.
Every lab grown diamond is also 100% conflict-free by nature. Since they are created in a controlled laboratory environment, there is no possibility of funding armed conflict — a concern that has historically shadowed the mined diamond trade.
For buyers who want a beautiful diamond that aligns with their values, lab grown is a compelling choice.
Should You Buy a Lab Grown Diamond? Honest Pros & Cons
Pros
Identical quality to mined diamonds — same hardness, sparkle, and durability
40–70% more affordable — your budget buys a significantly larger or better stone
Certified by GIA and IGI — same grading system, same standards
Always conflict-free — traceable, ethical origin guaranteed
Environmentally responsible — lower carbon footprint than mining
Customisable — grown to specific sizes, shapes, and quality grades
Cons
Emotional preference — some buyers value the rarity and geological story of a mined diamond
The bottom line: if you are buying a diamond to wear, love, and cherish — a lab grown diamond gives you more stone, more quality, and a cleaner conscience for less money.
The Verdict: Are Lab Grown Diamonds Real?
Yes — completely, scientifically, and unambiguously real.
Lab grown diamonds are the same material as mined diamonds. Same atoms. Same crystal. Same sparkle. Same hardness. Same certification. The only difference is the postcode of their birth — not their beauty, not their quality, not what they are.
Whether you are shopping for an engagement ring, a special gift, or simply a piece of jewellery you will love wearing every day, a lab grown diamond gives you everything a mined diamond does — at a fraction of the price, with a cleaner conscience.
In 2026, there has never been a better time to choose one.
Frequently Asked Questions
1. Are lab grown diamonds real diamonds?
Yes, lab grown diamonds are 100% real diamonds. They have the same chemical composition, hardness, brilliance, and sparkle as natural mined diamonds. The only difference is that lab grown diamonds are created in advanced laboratories instead of forming underground over billions of years.
2. What is the difference between lab grown diamonds and natural diamonds?
Lab grown diamonds and natural diamonds are physically, chemically, and optically identical. Both are made of pure carbon and are graded using the same 4Cs standards — Cut, Colour, Clarity, and Carat. The main differences are origin, price, and environmental impact.
3. Why are lab grown diamonds cheaper than mined diamonds?
Lab grown diamonds are generally 40–70% more affordable because they do not require expensive mining operations, transportation, and large supply chains. This allows buyers to purchase larger and higher-quality diamonds at a better price.
4. Do lab grown diamonds pass diamond testers?
Yes. Lab grown diamonds pass standard diamond testers because they are real diamonds with the same thermal conductivity and hardness as mined diamonds. Most standard testing machines cannot differentiate between the two.
5. Are lab grown diamonds certified?
Yes. Reputable lab grown diamonds come with certification from trusted gemological laboratories such as IGI and GIA. These certificates verify the diamond’s Cut, Colour, Clarity, and Carat weight, ensuring authenticity and quality.
6. Are lab grown diamonds good for engagement rings?
Absolutely. Lab grown diamonds are becoming one of the most popular choices for engagement rings because they offer the same beauty, durability, and sparkle as mined diamonds while being more affordable and environmentally responsible.
7. Why choose Nishal Gems for lab grown diamonds?
Nishal Gems provides high-quality certified lab grown diamonds with a strong focus on transparency, ethical sourcing, and competitive pricing. We offer carefully selected diamonds for jewellery manufacturers, retailers, and individual buyers worldwide.
Interested in sourcing CVD lab-grown diamonds? contact our team to discuss your requirements.
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