What Are Lab-Grown Diamonds? Your Ultimate Guide

What is a lab grown diamond?

A lab grown diamond is pure carbon arranged in a cubic crystal structure — chemically, physically, and optically identical to a diamond formed deep in the earth over billions of years. The only difference is where and how it was created. One grew under the ground. The other was grown in a laboratory in a matter of weeks.

A gemologist with a standard loupe cannot tell them apart. Neither can a diamond tester — both conduct heat identically. Distinguishing a lab grown diamond from a mined one requires specialist equipment that detects trace differences in crystal growth patterns, not anything visible to the eye.

The term "synthetic diamond" sometimes appears in older literature, but it is misleading. Synthetic implies artificial or fake. Lab grown diamonds are neither — they are the same material, grown through a different process. At Vai Ra, we use the term lab grown diamond, which is the industry standard used by the International Gemological Institute (IGI) and most certification bodies worldwide.

How are lab grown diamonds made?

There are two methods used to grow diamonds in a laboratory. Both start with a tiny diamond seed — a sliver of existing diamond crystal — and both build on it, layer by layer, until a full diamond is formed.

High Pressure High Temperature (HPHT)

This method replicates the conditions under which natural diamonds form in the earth — extreme pressure and extreme heat. A diamond seed is placed in a chamber with a carbon source and subjected to pressures of around 1.5 million pounds per square inch and temperatures exceeding 1,400°C. Carbon atoms attach to the seed and crystallise into a diamond over a period of days to weeks.

Chemical Vapour Deposition (CVD)

CVD is a lower-pressure process. A diamond seed is placed in a sealed chamber filled with a carbon-rich gas — typically methane. The gas is energised using microwave plasma, breaking the molecular bonds and releasing carbon atoms that deposit onto the seed layer by layer, building a diamond from the inside out. CVD diamonds can be grown at lower temperatures and produce larger, higher-clarity stones with greater consistency.

Lab grown vs mined diamond — the full comparison

Here is how lab grown and mined diamonds compare across the properties that matter when choosing fine jewellery.

Are lab grown diamonds real diamonds?

Yes. This question comes up often, and the answer is unambiguous. Lab grown diamonds are real diamonds. The Federal Trade Commission in the United States ruled in 2018 that the definition of a diamond does not require geological formation — it is defined by its carbon crystal structure, which lab grown diamonds share completely.

The IGI, which certifies every lab grown diamond at Vai Ra, grades them using the same 4Cs framework used for mined diamonds — cut, colour, clarity, and carat weight. The certificate does not say "lab grown diamond simulant." It says "lab grown diamond."

What lab grown diamonds are not: cubic zirconia (which is zirconium oxide, much softer, and visually distinct under magnification), moissanite (silicon carbide — a different gemstone entirely, though also beautiful and certified at Vai Ra), or glass. These are entirely different materials. A lab grown diamond is a diamond.

Why choose a lab grown diamond?

The same stone at a fraction of the price

A 1 carat IGI-certified lab grown diamond at Vai Ra costs ₹35,000 — fixed pricing, no negotiation. A natural diamond of the same grading (D–F colour, VVS clarity) starts from ₹3 lakh and climbs steeply with size. The visual difference to the naked eye is zero. The price difference is significant, and it can go toward a better setting, a higher gold karat, or a larger stone.

Certified and traceable

Every lab grown diamond at Vai Ra is IGI certified. The certificate is issued by an independent laboratory before the stone reaches us — it is not a Vai Ra document, it is an international grading report verifying the stone's exact specifications. You know precisely what you are buying.

Consistent quality

Because lab grown diamonds are produced under controlled conditions, the quality at a given grade is highly consistent. A DEF VVS lab grown diamond is a DEF VVS stone — there is very little variance in practice. With natural diamonds, even stones of the same grade can vary considerably in how they perform visually, which is why independent certification matters even more.

Ethical and conflict-free

Lab grown diamonds carry no mining-related ethical concerns. There is no Kimberley Process to navigate, no provenance to verify, no questions about which region the stone came from or under what conditions it was extracted. The origin of every lab grown diamond at Vai Ra is known, traceable, and clean.

Lower environmental footprint

Open-pit diamond mining involves significant land displacement, water use, and carbon emissions. Lab grown diamonds require energy to produce — primarily electricity — but the overall environmental footprint is substantially lower than mined diamond extraction at equivalent scale.

IGI certified lab grown diamonds — shop Vai Ra

Every piece below is set with an IGI-certified lab grown diamond, DEF colour, VVS clarity, in BIS hallmarked gold. Made to order — your size, your metal, your setting.

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