Do Lab Grown Diamonds Pass a Diamond Tester?

January 13, 2024
Do lab-grown diamonds pass a diamond tester?

Let's talk about something that's been creating quite a buzz lately: lab-grown diamonds. You've probably heard about them, right? These gems are not just stunning but also a testament to incredible technological advances. But here's the million-dollar question we all want answered: Do Lab Grown Diamonds Pass a Diamond Tester? It's a fascinating topic, especially if you're in the market for some bling or just love keeping up with the latest in jewelry trends. 

Why is this such a big deal? Well, with lab-grown diamonds becoming more popular (thanks to their friendlier price tag and environmental benefits), it's becoming increasingly important to understand exactly what sets them apart. Are they indistinguishable from their natural counterparts, or is there a way to tell them apart?

Join me on this eye-opening journey as we put lab-grown diamonds under the microscope and test their authenticity. It's a story of science, sparkle, and a little bit of mystery – and I promise, it's as intriguing as it sounds!

Do Lab Grown Diamonds Pass a Diamond Tester? Explained

Explore our selection of stunning lab-grown diamond engagement rings here

What is a Lab Diamond Tester?

A diamond tester is a special tool that jewelers use to find out if a stone is a real diamond. It's a small, portable device that checks how well a diamond can move heat away. This ability, known as thermal conductivity, is a key feature of real diamonds. The tester has a probe that, when placed on the diamond, measures how quickly it conducts heat. If the stone conducts heat fast, the tester indicates it's a real diamond. This tool is really helpful for jewelers to quickly and accurately identify real diamonds from other look-alike stones.

How Does a Diamond Tester Tell if a Diamond is Real?

A diamond tester works by checking how fast a diamond moves heat away, which is called thermal conductivity. Diamonds are really good at this – they can get rid of heat quickly. When you touch a diamond with a diamond tester's probe, the diamond takes the heat away fast. This quick reaction tells the tester it's a real diamond.

But what if the stone isn't a diamond? Some stones look like diamonds but don't act like them. Take cubic zirconia or moissanite, for example. They might look pretty, but they can't move heat away like a diamond can. When they're tested, they don't change the heat the same way, so the tester says they're not real diamonds.

Now that you know how a diamond tester works, we can explore if lab-grown diamonds can pass this test. Stick around to find out!

Lab-Grown Diamonds and Thermal Conductivity:

Have you heard about lab-grown diamonds? They're also called synthetic or cultured diamonds. These diamonds aren't found in the ground; instead, they're made using really smart technology that copies how diamonds are made naturally. The cool thing is, they're just like natural diamonds in every way - how they look, what they're made of, and even how they handle heat.

Here's an interesting fact: lab-grown diamonds are great at moving heat away quickly, just like real diamonds from the earth. This is known as high thermal conductivity. So, what does this mean for our diamond tester? Well, when you use a diamond tester on these lab-grown diamonds, they usually pass the test and show up as real diamonds, just like the ones that come from deep within the earth.

How to Tell Lab-Grown Diamonds Apart from Natural Ones:

So, we know that diamond testers can tell if a stone is a real diamond or not. But there's a catch – they can't tell you where the diamond came from. This means they can't spot the difference between a diamond made in a lab and one dug up from the earth. Both types pass the tester because they both are good at moving heat away.

Now, you might be wondering, "Is there a way to tell them apart?" The answer is yes, but it needs some fancy testing. To differentiate between lab-grown and natural diamonds, more advanced testing methods are required. There are special places called gemological laboratories, like the Gemological Institute of America (GIA) and the International Gemological Institute (IGI).

They have really advanced equipment, like machines that do spectroscopy, which is like a super-detailed examination. These tests look at how the diamond grew and what it's made of. With these tests, experts can definitely say if a diamond was made in a lab or if it came from the ground.

Aspect Lab-Grown Diamonds Natural Diamonds
Composition Identical to natural diamonds (carbon in crystalline form) Carbon in crystalline form
Thermal Conductivity High, similar to natural diamonds High
Response to Diamond Tester Typically passes, as thermal conductivity is similar to natural diamonds Passes, due to high thermal conductivity
Detection by Standard Tester Cannot be distinguished from natural diamonds by standard diamond testers Identified as diamond
Need for Advanced Testing Advanced tests required to differentiate from natural diamonds Identified without advanced tests
Main Identifying Factor Heat dispersion similar to natural diamonds Heat dispersion characteristic of diamonds

Do Lab Grown Diamonds Pass a Diamond Tester?

Yes, lab-grown diamonds do pass a diamond tester. They have the same ability to conduct heat as natural diamonds, which is what diamond testers check for. So, when tested, lab-grown diamonds will typically show up as real diamonds just like their natural counterparts.

The Role of Certifications:

Why Certifications Are Important When Choosing Diamonds:

When you're looking to buy a diamond, whether it's lab-grown or natural, there's something super important you should look for – a certification from a trusted gem lab. The Gemological Institute of America (GIA) and the International Gemological Institute (IGI) are two big names in this field. They check out each diamond and give a report that tells you all about it. This includes the 4Cs – that's the diamond's carat weight, color, clarity, and cut – and also confirms if the diamond is lab-grown or came from the earth.

Why do jewelers use these certifications? It's all about trust. When a jeweler shows you a diamond with a certification from a place like GIA or IGI, it means you can be sure about what you're buying. It's like a promise that the diamond is just as they say it is.

At LL Private Jewellers, we're all about being open and honest with our customers. That's why we offer lab-grown diamonds that come with certifications from IGI, GCAL, and GIA. We want you to feel confident and happy when you choose a diamond from us.

Our collection is all about the beauty and good value of lab-grown diamonds. And our team is here to help you find the perfect one that matches your style and what you believe in. Come visit us and take a look at our lab diamonds. We're ready to give you a personal shopping experience that's all about what you need.


In summary, when it comes to the question Do lab grown diamonds pass a diamond tester? the answer is a resounding, Yes lab-grown diamonds do pass a standard diamond tester due to their high thermal conductivity, which is identical to that of natural diamonds. However, a diamond tester alone cannot determine whether a diamond is lab-grown or mined. For a conclusive identification, more sophisticated testing methods and certifications from reputable gemological laboratories are required.

What's really cool about lab-grown diamonds is how they offer a choice that's good for the earth. They let you enjoy the sparkle and beauty of a real diamond, but in a way that's more ethical.

And guess what? They're becoming more popular every day. When you're ready to buy one, just make sure to go to a trusted jeweler who can give you all the right info and the proper certificates. This way, you can pick out a beautiful diamond and feel great about your choice, knowing exactly what you're getting.

Frequently Asked Questions and Answers

What is a diamond tester?

A diamond tester is a tool used to determine whether a gemstone is a real diamond. It measures how well the stone conducts heat – a key property of diamonds.

Will lab made diamonds pass the diamond tester?

Yes, lab-made diamonds will pass a standard diamond tester due to their high thermal conductivity, which is similar to natural diamonds.

How does a diamond tester work?

A diamond tester measures thermal conductivity. Real diamonds conduct heat well, so when they are tested, they disperse heat quickly, showing they are real. Simulants like cubic zirconia don't conduct heat as well, so they show up as not real diamonds.

Can a diamond tester tell if a diamond is lab-grown or natural?

A standard diamond tester, which typically measures thermal conductivity or electrical conductivity, cannot distinguish between lab-grown (synthetic) diamonds and natural diamonds because both types of diamonds have virtually identical physical and chemical properties. These testers are designed to differentiate diamond from non-diamond material.

Do lab grown diamonds test real?

Yes, lab-grown diamonds test as real diamonds. They possess the same physical, chemical, and optical properties as natural diamonds, making them indistinguishable from mined diamonds in most tests.

Why are certifications important for diamonds?

Certifications from reputable labs provide detailed information about a diamond's quality and origin, confirming whether it's lab-grown or natural and ensuring its authenticity.

Are lab-grown diamonds real diamonds?

Yes, lab-grown diamonds are real diamonds with the same physical, chemical, and optical properties as natural diamonds.

Also ReadAre Lab Grown Diamonds Real? Here's The Truth

Do lab-grown diamonds offer any benefits over natural diamonds?

Lab-grown diamonds are more sustainable and often more affordable, providing a more ethical choice without compromising the quality and beauty of a real diamond.

Will lab created diamonds test as real diamonds?

Yes, lab-created diamonds will test as real diamonds. Their identical composition and characteristics to natural diamonds mean they pass standard diamond tests with the same results.

Explore our beautiful lab diamond engagement ring collection here. For any questions or assistance, feel free to contact us at your convenience.

About The Author

Author's Name

Emma Rae

Emma Rae, a distinguished Canadian jewelry writer, boasts over five years of expertise in the industry. Known for her deep understanding of jewelry design and trends, she's a credible and authoritative voice. Her insightful writing, featured in top jewelry magazines and online platforms, showcases her passion and respect for craftsmanship. Emma engaging and knowledgeable articles have earned her recognition and trust in the jewelry fashion world.



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