While lab-grown and natural diamonds are chemically identical, advanced machines can detect subtle differences in growth patterns and fluorescence that reveal their origin. Jewelers and gemological labs use specialized diamond testing machines such as DiamondView™, DiamondSure™, and other spectroscopic tools to determine whether a diamond is natural or lab-grown.
Why Do We Need Machines to Test Diamonds?
Both lab-grown diamonds and natural diamonds are made of pure carbon and share the same hardness, brilliance, and durability. To the naked eye—and even under a jeweler’s loupe—they look identical.
That’s why machines are essential. They allow gemologists to see differences in growth structures, trace elements, and reactions to light that distinguish a diamond’s origin.
Machines That Can Tell Lab Diamonds from Natural Diamonds
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DiamondView™ (GIA) – This highly advanced machine uses ultraviolet light to reveal growth patterns that are invisible to the naked eye. Natural diamonds and lab-grown diamonds fluoresce differently, making this a reliable test.
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DiamondSure™ (De Beers) – A screening device that uses ultraviolet and visible light to check if a diamond might be lab-grown. If the result is uncertain, the diamond is sent for more advanced testing.
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DiamondCheck™ (GIA) – Developed for the jewelry trade, this tool screens diamonds and refers potential lab-grown stones for further analysis.
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FTIR Spectroscopy (Fourier Transform Infrared) – Detects trace elements and structural differences between natural and lab-grown diamonds.
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UV Light Testing – Many lab-grown diamonds fluoresce differently than natural stones under UV light. While not always conclusive, it’s an effective screening method.
Can Jewelers Detect Lab Diamonds Without Machines?
Not accurately. Even expert jewelers cannot distinguish between lab-grown and natural diamonds by sight alone. Certification and advanced testing machines are the only way to know for sure.
Frequently Asked Questions About Diamond Testing
Are lab-grown diamonds “fake”?
No. Lab-grown diamonds are real diamonds with the same chemical composition as natural ones. The difference is how they were formed—one in the earth, one in a lab.
Can a diamond tester tell if a diamond is lab-grown?
Standard thermal conductivity testers cannot tell the difference. Only advanced machines like DiamondView™ or spectroscopic tools can.
Why does it matter if a diamond is lab or natural?
Both are beautiful, but natural diamonds are rare and formed over billions of years, while lab-grown diamonds are more affordable and sustainable. The distinction is important for value and certification.
Does Martin Busch Jewelers sell lab-grown or natural diamonds?
We offer both natural and lab-grown diamonds, always clearly labeled and certified so you know exactly what you’re buying.
Diamond Testing at Martin Busch Jewelers
At Martin Busch Jewelers, we believe in complete transparency. Whether you choose a natural diamond or a lab-grown one, you can trust that your stone has been properly tested, certified, and represented honestly. Our experts use trusted gemological certifications and advanced technology to ensure your diamond’s authenticity and origin. Visit our NYC showroom or explore our diamond selection online to find the perfect stone with confidence.