One of the questions we hear the most is surprisingly simple.
"If lab grown diamonds are real diamonds, can a jeweller actually tell the difference?"
No. A jeweller cannot distinguish a lab grown diamond from a mined diamond through visual inspection alone. Both have the same chemical, physical, and optical properties, which means they look identical to the naked eye. Specialised laboratory equipment is required to determine whether a diamond was grown in a laboratory or formed naturally within the Earth.
It is a fair question, though. After all, both look the same to the naked eye. Both sparkle the same way. Both are made of crystallised carbon. Both are graded using the same standards for cut, colour, clarity, and carat.
In fact, if you placed a mined diamond and a lab grown diamond side by side, even an experienced jeweller could not reliably identify which is which through visual inspection alone.
That is because lab grown diamonds are not diamond lookalikes. They are real diamonds with the same chemical, physical, and optical properties as mined diamonds.
The distinction only becomes visible when specialised gemological equipment is used to identify growth patterns and trace characteristics that reveal how the diamond was formed.
So can jewellers really tell the difference? No, at least not by looking at it.
Want to know more? Let's explore what professionals actually look for, how diamonds are tested, and why the answer is far more interesting than most people expect.
They Share the Same DNA
At their core, both lab grown and mined diamonds are crystallised carbon with a Mohs hardness of 10, the same refractive index, the same thermal conductivity, and the same brilliance.
The Gemological Institute of America has confirmed that lab grown diamonds are "essentially chemically and optically the same as their natural counterparts." This is why no jeweller, regardless of experience, can distinguish between a lab grown and mined diamond through visual inspection alone.
Much of the conversation around lab grown v mined diamond choices comes down to origin rather than appearance.
For anyone still asking whether lab grown diamonds are real or if lab-created diamonds are real, the answer lies in their structure itself. They are real diamonds in every scientific sense.
What differs is not the material but the origin story. Mined diamonds spent anywhere between one billion and three billion years forming under extreme heat and pressure within the Earth's mantle before volcanic activity brought them close to the surface.
Lab grown diamonds replicate those exact conditions in a controlled environment, completing their growth in a matter of weeks.
So, How Are Lab Grown Diamonds Actually Made?
There are two established methods:
HPHT (High Pressure, High Temperature): A small diamond seed is placed in a carbon source alongside a metal flux and subjected to temperatures between 1,300 and 1,600 degrees Celsius and pressures of up to 59,200 atmospheres. The carbon dissolves into the flux and crystallises around the seed, forming a real diamond.
CVD (Chemical Vapor Deposition): A diamond seed is placed inside a chamber filled with carbon-rich gases. The chamber is heated to around 800 to 900 degrees Celsius, and carbon atoms from the gas begin depositing onto the seed layer by layer, growing a diamond from the ground up.
Both methods produce diamonds with the same atomic structure. The process is different; the result, structurally speaking, is the same mineral.
Do Lab Diamonds Pass a Diamond Test?
This is one of the most searched questions we come across, and the answer is straightforward: yes, and the answer is straightforward: they do.
Questions like “Do lab diamonds pass the diamond test?” are common because many buyers assume laboratory-grown diamonds behave differently during testing.
These devices measure thermal conductivity, and since lab grown diamonds conduct heat the same way mined diamonds do, they register as diamonds every time. They are not confused with simulants like cubic zirconia or moissanite, which behave differently on the test.
A standard diamond tester, the kind most jewellers keep on their counter, cannot distinguish between a lab grown and a mined diamond. The two are genuinely too similar for that level of equipment to detect any difference.
What Can Actually Tell Them Apart?
This is where it gets technically interesting. Trained gemologists with access to advanced laboratory equipment can identify a diamond's origin. Here is what they look for:
Inclusions and internal features: Mined diamonds often trap mineral particles during their billions of years of formation, creating what are called inclusions. Feathers, crystals, and clouds are common in mined diamonds. Lab grown diamonds, by contrast, can contain metallic flux inclusions (from the HPHT process) and banded strain patterns (from the CVD process). These are present but different in character.
Nitrogen presence: Most mined diamonds contain trace amounts of nitrogen, which gives them their type Ia classification and occasionally a slight yellow tint. Lab grown diamonds, because their growth is precisely controlled, are typically free of nitrogen, making them type IIa, a classification that covers only about two per cent of all mined diamonds. Detecting this type requires specialised UV transparency testing.
Growth morphology: Mined diamonds grow in eight crystallographic planes, HPHT diamonds in fourteen, and CVD diamonds in one. Once a diamond has been cut and polished, these growth patterns are no longer visible to the naked eye. But specialised spectroscopic equipment can still detect the residual signatures of how the diamond grew.
Photoluminescence spectroscopy and DiamondView: DiamondView emits shortwave UV light and captures the diamond's fluorescence pattern. Because growth conditions produce distinct fluorescence signatures, this method can reliably identify whether a diamond formed naturally within the Earth or was grown in a laboratory. This is not a process a retail jeweller performs in-store; it requires sending the diamond to a certified gemological laboratory.
Laser inscription on the girdle: Most reputable lab grown diamonds have a microscopic laser inscription on the girdle, the widest edge of the diamond, that can be read with a 30x jeweller's loupe. This is often the most immediate and practical way for a jeweller to confirm a diamond's origin, because it is right there on the diamond itself.
The Certification Piece: What Changed Recently
Today, every genuine lab grown diamond comes with a transparent certification that clearly states its origin, quality, and specifications. At Keemti, our diamonds are certified by SGL, giving you complete clarity about the piece you are choosing.
An SGL certificate evaluates the same essential qualities expected from fine diamond jewellery:
This matters because when you invest in jewellery that becomes part of your everyday life, trust should feel effortless.
For many women buying their first diamond, certification removes uncertainty completely. It confirms that the diamond you are wearing is real, professionally evaluated, and held to recognised quality standards.
The certificate also clearly states the diamond’s origin, offering transparency from the very beginning. That honesty is important to us because we believe luxury should feel personal, informed, and authentic from every angle.
Why This Matters When You Are Choosing a Keemti Piece
We often hear from women who are buying their first diamond and are not entirely sure what they are holding, whether what they are wearing is genuinely a diamond.
We want to be clear: every diamond in a Keemti piece is a real diamond. It is lab grown, which means it is conflict-free, ethically created, and carries the same brilliance as a mined diamond because it is the same material.
Our Workwear Collection features pieces designed for the woman who wants her jewellery to work as hard as she does. Clean, confident solitaires and minimal designs that read as elevated, whether she is in a meeting or heading out after. When you wear a diamond every day, knowing exactly what it is matters.
The Timeless Collection holds pieces that were designed to outlast every passing trend, classics in the truest sense. These diamonds are chosen with the same standards applied to any fine jewellery purchase: cut, colour, clarity, and carat. The lab origin does not dilute that standard; it simply changes where the growth happens.
And our Love Collection carries pieces made for moments that deserve to be marked. An anniversary, a promise to yourself, a milestone that the world may or may not know about but that you will never forget. The diamond at the centre of that piece is chosen with the same care and quality standards expected from fine jewellery.
A Shift Worth Noting
The conversation around diamonds has evolved significantly in recent years. More women today are choosing jewellery with intention, looking beyond tradition and focusing on craftsmanship, transparency, wearability, and personal meaning.
Lab grown diamonds have naturally become part of that shift. What once felt new is now becoming an established part of modern fine jewellery, especially for women who want pieces that align with both their lifestyle and values.
Advances in diamond growing technology have also elevated the quality of lab grown diamonds available today, with exceptional cut, colour, and clarity standards that make them visually indistinguishable from mined diamonds in everyday settings.
What makes this change meaningful is how diamonds are being worn now. They are no longer reserved only for engagements or milestone occasions. Women are choosing them for work, travel, everyday layering, self-gifting, and personal celebrations that matter quietly but deeply.
This is not about replacing tradition. It is about redefining luxury in a way that feels more personal, conscious, and relevant to modern life.
The Honest Answer
Can a jeweller tell lab grown and mined diamonds apart? Without specialised tools, no. With equipment like photoluminescence spectroscopy or DiamondView, yes, a trained gemologist at a certified lab can identify the origin. In everyday settings, including most jewellery stores, the two are indistinguishable. A standard diamond tester will confirm both as diamonds without hesitation.
What a certificate will tell you, clearly and without ambiguity, is exactly what you are holding and where it came from. That is the information that matters.
At Keemti, we do not ask you to take our word for it. We put it in the certification, in the craftsmanship, and in the care with which every piece is designed. A lab grown v Mined diamonds comparison ultimately comes down to origin, not authenticity.
A lab grown diamond is precious not because it mimics something else, but because it is, in every material sense, the same thing, grown with purpose and worn with pride.
Because what makes a diamond meaningful is not only how it was formed, but the story it becomes part of.
FAQs
Are lab diamonds real?
Yes, lab diamonds are real diamonds with the same chemical, physical, and optical properties as mined diamonds.
Are lab-created diamonds real or artificial?
Lab-created diamonds are real diamonds made from crystallised carbon, not diamond simulants.
Do lab diamonds pass diamond test devices?
Yes, lab diamonds pass diamond test devices because they have the same thermal properties as mined diamonds.
Lab grown diamonds: are they real enough for everyday wear?
Yes, lab grown diamonds are real and durable enough for everyday jewellery, with the same hardness as mined diamonds.
Can jewellers tell the difference between lab grown and mined diamonds?
Not through visual inspection alone; specialised gemological equipment is required to determine a diamond's origin.
