Do Lab Grown Diamonds Test Real?

Do Lab-Grown Diamonds Test Real? Demystifying the Authenticity of Man-Made Gems 💎💍

As the popularity of lab-grown diamonds continues to rise, many consumers find themselves asking a crucial question: Do lab-grown diamonds test real? With the physical and chemical similarities between lab-grown diamonds and natural diamonds, it's essential to understand how these two types of diamonds can be distinguished and verified. In this blog, we will explore the methods used to test the authenticity of lab-grown diamonds and debunk any misconceptions surrounding these beautiful, man-made gems.

Understanding Lab-Grown Diamonds:

Lab-grown diamonds are diamonds created through a controlled process in a laboratory environment. These diamonds have the same chemical composition and crystal structure as natural diamonds, making them virtually indistinguishable to the naked eye. The main distinction lies in their origin, as lab-grown diamonds are cultivated in weeks or months, as opposed to natural diamonds, which take millions of years to form deep within the Earth.

Testing the Authenticity of Lab-Grown Diamonds:

To determine whether a diamond is natural or lab-grown, gemologists use various methods of testing. These techniques rely on the unique properties and characteristics of diamonds, whether natural or synthetic. The primary methods for testing lab-grown diamonds include:

  1. Diamond Certification: One of the most reliable ways to verify the authenticity of a lab-grown diamond is through its certification. Reputable gemological laboratories, such as the Gemological Institute of America (GIA) or the International Gemological Institute (IGI), thoroughly examine and certify both natural and lab-grown diamonds. These certificates provide detailed information about the diamond's characteristics, including its origin.
  2. Spectroscopy: Spectroscopy is a scientific technique used to analyze the light absorption and emission properties of a diamond. Different types of spectroscopy, such as UV-Visible and Infrared spectroscopy, can be employed to distinguish between natural and lab-grown diamonds based on their unique light signatures.
  3. Diamond Growth Features: Lab-grown diamonds often exhibit specific growth features that are not present in natural diamonds. For instance, lab-grown diamonds may show distinct growth lines or patterns under high magnification, indicating their artificial origin.
  4. Inclusion Patterns: Inclusions are internal characteristics found in both natural and lab-grown diamonds. However, certain inclusion patterns may be more common in lab-grown diamonds due to the controlled growth process.
  5. High Pressure, High Temperature (HPHT) and Chemical Vapor Deposition (CVD) Techniques: Some lab-grown diamonds are created using HPHT or CVD methods, leaving specific traces that can be detected through advanced testing.

Testing A Lab Grown Diamond With A Normal Diamond Tester:

Lab-grown diamonds typically test as real diamonds in a normal diamond tester. Most traditional diamond testers are based on thermal conductivity, which measures how quickly a material conducts heat. Both natural diamonds and lab-grown diamonds have almost identical thermal conductivity, making it challenging for these testers to distinguish between the two.

Thermal diamond testers work by touching the diamond with a heated probe and measuring how fast the heat is conducted away from the probe. Since lab-grown diamonds have the same crystal structure as natural diamonds, they conduct heat similarly, leading the tester to indicate that both are real diamonds.

However, it's important to note that not all diamond testers are the same, and there are various types of diamond testing devices available, each with different technologies and capabilities. Some advanced testers may be able to identify lab-grown diamonds based on other properties or by detecting specific growth features. Additionally, diamond testers are not foolproof, and in rare cases, certain lab-grown diamonds may produce inconsistent results, especially if they have undergone treatments or have unique characteristics.

To conclusively determine whether a diamond is natural or lab-grown, a comprehensive analysis by a reputable gemological laboratory, such as the Gemological Institute of America (GIA) or the International Gemological Institute (IGI), is recommended. These laboratories use advanced techniques and equipment, including spectroscopy and other sophisticated testing methods, to provide accurate and reliable information about the diamond's origin and characteristics.

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Dispelling Misconceptions:

One common misconception about lab-grown diamonds is that they can easily deceive consumers into believing they are natural diamonds. However, due to the advancements in diamond testing technology and the strict standards set by gemological laboratories, it is challenging for lab-grown diamonds to be mistaken for natural diamonds when subjected to proper testing.

Additionally, it's essential to recognize that lab-grown diamonds are real diamonds. They possess the same physical, chemical, and optical properties as natural diamonds and are valued for their ethical and sustainable origins.


In conclusion, lab-grown diamonds can indeed be tested to determine their authenticity. Gemologists utilise a range of methods, including diamond certification, spectroscopy, examination of growth features and inclusion patterns, and detection of specific growth techniques to distinguish between natural and lab-grown diamonds. Lab-grown diamonds are real diamonds and offer a sustainable and ethical alternative to mined diamonds.

As the demand for ethically sourced and environmentally friendly options grows, lab-grown diamonds continue to shine as a beautiful and responsible choice for engagement rings and other jewelry. Whether you choose a natural diamond or a lab-grown one, what truly matters is the love and meaning behind the gem that makes it a cherished symbol of your commitment. 💍💕

Hope you guys enjoyed this blog and that it helps some of you out there that are looking for diamonds, diamond rings or engagement rings. Please feel free give us a call or send us a message if you have any questions.

To learn more about lab grown diamonds head on over to our 'Learn About Lab Grown Diamonds'  and 'The Essential Lab Grown Diamond Guide' pages.

Check out the our Lab Grown Diamond Engagement Ring collections:

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