A lab-grown diamond is simply a diamond that was created inside a laboratory instead of being dug out of the ground.
Think of it this way: both a mined diamond and a lab-grown diamond are made of the exact same thing - carbon, the same element found in graphite and coal. What makes a diamond a diamond is how those carbon atoms are arranged. Under extreme heat and pressure, carbon atoms bond together in a very specific, incredibly tight formation that creates the hardest natural material on earth. A lab-grown diamond has that same formation. It is built the same way, looks the same way, and behaves the same way as a diamond pulled from the ground, because it is one.
When you hold a lab-grown diamond under a light, it sparkles the same way. When you scratch it against another material, it holds the same way. When a gemologist examines it, it grades the same way. In fact, even the most advanced equipment used by gemological laboratories cannot easily tell them apart without highly specialised testing that goes far beyond what any jeweller does in a normal setting.
The GIA (Gemological Institute of America) and the IGI (International Gemological Institute), the two most respected diamond grading organisations in the world, both certify lab-grown diamonds using the same standards they apply to mined diamonds. Same process, same report, same meaning.
Fact: The US Federal Trade Commission (FTC) officially updated its definition of a diamond in 2018 to remove the word "natural," formally recognising that lab-grown diamonds are, by definition, real diamonds.
What lab-grown diamonds are not: cubic zirconia, moissanite, or any other diamond simulant (imitation stones designed to look like real diamonds but made of entirely different materials). Those are entirely different materials that look similar to diamonds but have completely different chemical compositions and physical properties. A lab-grown diamond is not a substitute for a diamond; it is a diamond.
How Are Lab-Grown Diamonds Made?
Here's where it gets genuinely interesting. Scientists have developed two ways to grow diamonds in a lab, and both are essentially doing the same thing: recreating the conditions that produce diamonds naturally deep inside the earth, just in a controlled environment, and in a fraction of the time.
In nature, diamonds form about 150 kilometres below the earth's surface where intense heat and pressure compress carbon over millions of years. In a lab, that same process is replicated in weeks, not millennia.
Method 1: The Pressure Method (HPHT)
The first method, developed in the 1950s, works by applying enormous heat and pressure to carbon, mimicking exactly what happens underground. Here's how it works in simple terms:
- A tiny fragment of an existing diamond, called a seed, is placed inside a specialised machine.
- The machine applies extreme heat (think: hotter than the surface of the sun) and pressure (far greater than anything found on the earth's surface) to the carbon surrounding the seed.
- Under those conditions, the carbon melts and slowly attaches itself to the diamond seed, layer by layer.
- Over the course of a few days to a few weeks, a full rough diamond crystal grows.
The result is a real diamond which just grew in a machine rather than underground over millions of years. Diamonds made this way sometimes have a faint yellow tint, though high-quality versions are grown colourless.
Method 2: The Gas Method (CVD)
The second method, more commonly used today, takes a different approach and it's arguably even more remarkable.
- A diamond seed is placed inside a sealed chamber, almost like a small oven.
- The chamber is filled with a carbon-rich gas, the same type of carbon that diamonds are made of.
- The chamber is heated to high temperatures, which causes the gas to break apart and release carbon particles.
- Those carbon particles settle onto the diamond seed, stacking up layer by layer, the way snow builds up on a surface.
- Over two to four weeks, a full rough diamond crystal forms from the ground up.
This method gives scientists more control over the final stone, producing diamonds that are often cleaner, larger, and more consistently colourless than the pressure method.
Lab-Grown vs Mined Diamonds
This is the question most buyers are really asking. And the answer depends entirely on what you're comparing.
Physical and Chemical Properties
| Property | Lab-Grown Diamond | Mined Diamond |
|---|---|---|
| Chemical composition | Pure carbon (C) | Pure carbon (C) |
| Crystal structure | Cubic | Cubic |
| Hardness (Mohs scale) | 10 | 10 |
| Refractive index | 2.417–2.419 | 2.417–2.419 |
| Thermal conductivity | ~2,000 W/mK | ~2,000 W/mK |
| Density | 3.52 g/cm³ | 3.52 g/cm³ |
| Certifiable by GIA/IGI | Yes | Yes |
In every measurable physical and chemical property, they are the same stone
What You Should Know Before Buying One
1. Price
This is one of the most significant differences and it almost always surprises buyers.
Price is only one part of the buying decision. If you are also wondering what happens to the value of a lab-grown diamond after purchase, read our guide to lab-grown diamond resale value and what buyers should know.
Lab-grown diamonds typically cost 50–70% less than mined diamonds of equivalent cut, colour, clarity, and carat weight. A 1-carat, D-colour, VS1-clarity mined diamond might retail for ₹5–7 lakh or more. A lab-grown diamond with identical grades would typically cost ₹1.5–3 lakh.
2. Environmental Impact
Mined diamonds require significant land disruption, water usage, and energy to extract. It is estimated that mining one carat of diamond displaces roughly 250 tonnes of earth and uses approximately 127 gallons of water.
Lab-grown diamonds produced using renewable energy sources have a significantly lower environmental footprint. While the energy demands of the growth process are not negligible, the overall impact in terms of land use, water consumption, and carbon emissions is considerably lower than traditional mining when responsibly produced.
3. Understanding the 4Cs, What Actually Makes a Diamond Beautiful
Whether you're buying a lab-grown or mined diamond, the quality of the stone is determined by four characteristics, universally known as the 4Cs. Understanding them gives you real purchasing power.
| The 4C | What It Measures | Sweet Spot for Value |
|---|---|---|
| Cut | Light performance and brilliance | Excellent or Very Good |
| Colour | Presence of yellow or brown tint | D–H for colourless; I–J for near-colourless |
| Clarity | Internal and external imperfections | VS1–SI1 (eye-clean) |
| Carat | Weight of the diamond | Slightly below round numbers (e.g. 0.9ct vs 1ct) |
Buying tip: A 0.95-carat diamond looks virtually identical to a 1-carat diamond in person, but can cost 15–20% less. Going just under popular carat thresholds (1ct, 1.5ct, 2ct) is one of the smartest ways to maximise your budget.
4. How to Read a Diamond Certificate
Never buy a diamond, lab-grown or mined, without a grading certificate from a recognised independent laboratory. A certificate is your guarantee that the stone is what the seller says it is.
The two most trusted certifying bodies are:
GIA (Gemological Institute of America) - widely considered the most rigorous and consistent grading standard in the world. A GIA-certified diamond is the gold standard.
IGI (International Gemological Institute) - the most widely used certifying body for lab-grown diamonds specifically, with comprehensive grading reports that include a laser inscription on the girdle of the stone identifying it as lab-grown.
What a Certificate Tells You
| Certificate Detail | What to Check |
|---|---|
| Shape and cutting style | Matches what you're being sold |
| Carat weight | Precise to two decimal places |
| Colour grade | D–Z scale |
| Clarity grade | FL to I3 scale |
| Cut grade | Excellent to Poor (round diamonds) |
| Polish and symmetry | Excellent or Very Good |
| Fluorescence | None to Strong (None or Faint preferred) |
| Origin | Should state "laboratory grown" or "synthetic" |
| Laser inscription | Unique ID number matching the certificate |
Important: Always verify that the certificate number on the report matches the laser inscription on the diamond's girdle. This is your proof that the stone in the ring is the same stone that was graded.
Choosing the Right Lab-Grown Diamond Jewellery
A lab-grown diamond gives you the same brilliance, durability, and certification standards as a mined diamond, often at a more accessible price point and with a lower environmental impact when responsibly produced.
But the diamond itself is only one part of the decision. The quality of the cut, the certification, the setting, and the craftsmanship all shape how the piece looks, feels, and lasts over time.
If you are choosing lab-grown diamond jewellery for wedding celebrations, versatility matters too. See how one jewellery set can work across every wedding function, from mehendi to reception with the right styling.
At Mayavé, lab-grown diamonds are chosen with this larger picture in mind. Each piece is designed around certified stones, thoughtful craftsmanship, and jewellery that feels refined enough for everyday wear and special enough for life’s important moments.
If you are exploring lab-grown diamond jewellery, look for clear certification, careful design, and a brand that helps you understand what you are buying, not just what looks beautiful at first glance.
FAQ's
1. Will a lab-grown diamond lose its sparkle over time?
No. A lab-grown diamond has the same hardness and optical properties as a mined diamond. With regular cleaning and care, it will maintain its brilliance indefinitely, just like any diamond would.
2. How should I care for a lab-grown diamond ring?
Clean it regularly with warm water, mild soap, and a soft brush. Avoid ultrasonic cleaners for pavé or intricate settings. Store it separately from other jewellery to prevent scratching, and have it professionally checked once a year.
3. Do lab-grown diamonds come in fancy colours?
Yes. Lab-grown diamonds can be produced in a range of different colours, including vivid yellows, blues, and pinks, often at a significantly lower price than their mined equivalents, which are extremely rare in nature.
4. What is the difference between a diamond graded by GIA vs IGI?
Both are reputable independent grading bodies. GIA is considered the most conservative and consistent standard globally. IGI is the most widely used for lab-grown diamonds specifically and provides equally detailed reports. Both are reliable and accepted worldwide.
