Lab-Grown Diamonds vs Natural Diamonds: What's the Real Difference?

Every week, someone at our Lajpat Nagar store holds a lab grown diamond in one hand and a natural diamond in the other and asks us to point out the difference. We tell them the truth. Without a laboratory instrument, nobody can see it.

So what separates the two? A lot, as it turns out, but almost none of it shows up in the stone itself. The differences sit in where the diamond came from, what it costs, and how you feel about both. This guide lays out each point side by side so you can decide for yourself.

The Short Answer

A natural diamond and a lab grown diamond are the same material. Both consist of pure carbon in a cubic crystal, both rate 10 on the Mohs scale, and both reflect light identically. Nature grew one over billions of years. A machine grew the other in a few weeks. That single difference in origin drives every other difference in price, rarity, and resale value.

Lab Grown vs Natural Diamonds at a Glance

How Each Diamond Forms

Natural diamonds form roughly 150 kilometres below the surface, where extreme heat and pressure squeeze carbon into crystals. That process takes one to three billion years. Deep volcanic eruptions later push the diamonds up through channels of rock called kimberlite pipes, and miners dig them out.

Lab grown diamonds start with a thin diamond seed. Technicians place the seed inside a machine that feeds it carbon, either by squeezing carbon under enormous pressure (the HPHT method) or by building it up from a carbon rich gas (the CVD method). The crystal grows layer by layer over a few weeks. You can read the full process in our complete guide to lab grown diamonds.

Both routes end at the same place. The atoms sit in the same arrangement, and the result is diamond.

Do They Look Different?

No. Light behaves the same way inside both stones. They share a refractive index of about 2.42, so the brilliance, fire, and scintillation match. Put a lab grown and a natural diamond of the same cut and grade under a shop light, and you will see the same sparkle.

Even a trained jeweller with a loupe cannot separate them reliably. Standard diamond testers cannot either, since both stones conduct heat in the same way. Only advanced equipment that reads the internal chemistry and growth patterns can identify the origin. That is why the girdle of every certified lab grown diamond carries a laser inscription that says so.

Are They Equally Durable?

Yes. A lab grown diamond scores 10 on the Mohs scale, the top of the scale, and so does a natural one. Neither will scratch under normal wear, and both can last for generations. You can wear either one every day, clean it the same way, and pass it on.

Durability depends on the setting and the metal far more than on the diamond's origin. Our metal guide explains how to choose gold that suits your lifestyle.

How Do Their Grades Compare?

Grading labs assess both types on the same four factors: cut, colour, clarity, and carat weight. A lab grown diamond and a natural diamond that grade identically on paper will look identical on the hand.

There is one pattern worth knowing. Most colourless lab grown diamonds are Type IIa, a very pure type that holds almost no nitrogen. Only a small fraction of natural diamonds fall in that category, and collectors prize them. This helps explain why lab grown stones often show excellent colour and clarity for their price.

Price: The Biggest Practical Difference

A lab grown diamond typically costs 60 to 80 percent less than a natural diamond of the same size and grade. The gap exists because miners have to find natural stones, extract them, and ship them through a long chain of sellers, while growers can produce lab grown stones on demand.

That difference changes what your budget can do. With the same money, you can:

• choose a larger carat weight

• move up in colour or clarity grade

• add side stones or a more detailed setting

• buy more than one piece

Prices for lab grown diamonds have also fallen over the last decade as production has scaled up, and they may keep moving. We suggest buying a diamond because you love it and plan to wear it, not because you expect the price to rise.

Resale Value: The Honest Version

We would rather tell you this now than have you find out later. Neither type of diamond works well as a financial investment.

Natural diamonds hold some resale value, mostly in larger stones with high grades and certificates. Even then, a retail buyer usually receives well below the original price when they sell. Lab grown diamonds currently hold very little resale value, because producers can make more of them and prices keep falling.

If resale matters to you, ask any jeweller for their exact exchange and buyback terms in writing before you pay. If you want jewellery to wear, celebrate with, and keep, resale matters far less. We built our own exchange policy so you can review the details before you decide.

Ethics and Environmental Impact

This topic attracts strong claims on both sides, so we will keep it balanced.

Mining moves large amounts of earth, changes local landscapes, and depends on long supply chains. The Kimberley Process exists to keep conflict diamonds out of the market, and many mining companies have improved their practices. Even so, some buyers prefer a stone with a shorter, more traceable path.

Lab growing avoids excavation and gives buyers a clear origin. It does use a lot of electricity, though, so the environmental footprint depends on the power source a producer uses. A grower running on renewable energy leaves a much lighter footprint than one running on coal.

Neither option is perfect. Ask any brand where its stones come from and how they grow them, and expect a specific answer.

Rarity and Sentiment

A natural diamond is rare, and its age is part of its story. Some people love the idea that their stone spent a billion years underground before it ever reached their hand. If that thought matters to you, a natural diamond gives you something a lab grown stone cannot.

A lab grown diamond carries a different story. It represents new technology, a lower cost, and a clear origin. Many of our customers tell us they want a diamond that fits their values and their budget at the same time.

Both feelings are valid. Choose the story you will enjoy telling.

Which One Should You Choose?

Choose a lab grown diamond if you:

• want the biggest and best stone your budget allows

• care about a traceable origin

• plan to wear the piece daily rather than treat it as an investment

• want to spend on design, metal, or extra stones

Choose a natural diamond if you:

• value rarity and geological age above everything else

• want a stone with a billion year history

• have a larger budget and plan to keep the piece long term

If you are still unsure, look at both in person. Our flagship store in Lajpat Nagar II, Delhi, lets you compare stones side by side, and you can book an appointment for one to one guidance.

How We Approach It at Nodes of Destiny

We work with lab grown diamonds because we believe they offer the best balance of beauty, quality, and value. We sell only IGI and SGL certified stones, set in BIS hallmarked gold, and we show the certification and the price on every listing. Our co-founder Abhishek Dhandia, a sixth generation jeweller and GIA certified AJP, oversees how we source and check every diamond.

If you want a piece built around your own idea, our ring designer lets you choose a diamond, pick a shape, and shape the setting yourself. You can also browse our rings, earrings, bracelets, and pendants online.

Frequently Asked Questions

Are lab grown diamonds and natural diamonds the same? Yes, in every physical and chemical sense. Both consist of carbon in a cubic crystal, and both look and behave identically. They differ in origin, price, and rarity.

What is the difference between a man made diamond and a natural diamond? A man made diamond grows in a laboratory, while a natural diamond forms underground over billions of years. The stones themselves are the same material.

Can a jeweller tell them apart? Not by eye or with a basic tester. Only specialised laboratory equipment can identify the origin, which is why certified lab grown diamonds carry a laser inscription.

Are lab grown diamonds cheaper than natural diamonds? Yes. They typically cost 60 to 80 percent less than a natural diamond of the same size and grade.

Do lab grown diamonds have resale value? Very little at the moment. Natural diamonds hold somewhat more, mainly in larger, high grade stones. Neither works well as an investment.

Do lab grown diamonds last as long as natural ones? They do. Both score 10 on the Mohs scale and resist scratching equally well.

Is a lab grown diamond better for the environment? It avoids mining and gives a traceable origin, but growing diamonds takes a lot of energy. The real impact depends on the power source the producer uses.

Final Thought

The real difference between lab grown and natural diamonds has little to do with how they look or how long they last. It comes down to origin, price, and what each stone means to you. Look at the certificate, ask about the terms, and choose the diamond you will love wearing. When you are ready, our team is here to help, online or in store.