Diamond Test: How to Tell if a Ring is a Real Diamond

Diamond Test: How to Tell if a Ring is a Real Diamond

Are you in possession of a ring and wondering if it’s a real diamond? In this article, we will provide you with valuable information on how to conduct a diamond test to determine the authenticity of your gemstone. From simple at-home tests to professional evaluations, we will guide you through the process of verifying whether your ring is indeed a real diamond.

Understanding the Characteristics of a Real Diamond


One of the key characteristics of a real diamond is its exceptional hardness. Diamonds are the hardest natural substance on Earth, scoring a perfect 10 on the Mohs scale of mineral hardness. This means that a real diamond is resistant to scratching and can only be scratched by another diamond. So, if a ring is able to scratch glass or other materials without showing any signs of damage, it is likely a real diamond.


Another defining characteristic of a real diamond is its brilliance. Diamonds are known for their ability to reflect light in a dazzling way, creating a sparkle that is unmatched by any other gemstone. A real diamond will exhibit a high level of brilliance, with light bouncing off its facets and creating a stunning display of shimmer and shine. This is one of the reasons why diamonds are such prized gemstones.

Fire and Sparkle

In addition to brilliance, a real diamond also displays fire and sparkle. Fire refers to the flashes of color that can be seen when a diamond is moved under light, while sparkle refers to the overall brightness and liveliness of the stone. Real diamonds are renowned for their ability to exhibit both fire and sparkle, creating a mesmerizing and captivating visual effect. If a ring displays intense flashes of color and a brilliant sparkle, it is likely a real diamond.

Conducting a Visual Inspection

When determining if a ring is a real diamond, one of the first steps is to conduct a visual inspection. Look closely at the stone to see if it has a high level of brilliance and sparkle, which are typical characteristics of a real diamond.

Examining the Stone’s Refractivity

Another way to tell if a ring is a real diamond is by examining its refractivity. A diamond’s ability to refract light creates a rainbow effect known as "fire". If you see this rainbow effect when shining a light on the stone, it is likely a real diamond.

Checking for Flaws and Inclusions

Real diamonds often have flaws and inclusions that can be seen under magnification. These imperfections are natural and indicate that the stone is not a synthetic or simulated diamond. Look for tiny marks, clouds, or dark spots within the stone.

Looking at the Mounting

Lastly, inspect the mounting of the ring to determine if it is a real diamond. Real diamonds are usually set in high-quality metals such as gold or platinum. Look for markings on the inside of the band indicating the metal type and quality. Additionally, real diamonds are typically secured with prongs rather than glue.

By following these tips for conducting a diamond test, you can determine if a ring is a real diamond with confidence.

Using Diamond Testing Tools

When it comes to determining whether a ring is a real diamond or not, there are several diamond testing tools that can help you make an accurate assessment. These tools are designed to measure specific properties of diamonds that can differentiate them from other gemstones. Here are some commonly used diamond testing tools:

Diamond Tester Pen

A diamond tester pen is a handheld device that can quickly and easily determine whether a gemstone is a diamond or not. The pen uses electrical conductivity to distinguish between diamonds and other gemstones. When the pen is placed on a diamond, it will produce a specific light and sound indicator, confirming the authenticity of the diamond. This tool is portable and user-friendly, making it a popular choice for jewelers and consumers alike.

Thermal Conductivity Tester

Another effective diamond testing tool is a thermal conductivity tester, also known as a diamond thermal tester. This device measures how well a gemstone conducts heat, which is a unique property of diamonds. Diamonds have high thermal conductivity, meaning they quickly dissipate heat when touched. By using a thermal conductivity tester, you can determine if a gemstone is a real diamond based on its heat conductivity properties.

UV Light Test

The UV light test is a simple yet effective way to distinguish between real diamonds and fake diamonds. Diamonds emit a blue fluorescence when exposed to ultraviolet (UV) light, while other gemstones may not exhibit this fluorescence. By using a UV light source, you can observe the reaction of a gemstone and determine if it is a real diamond based on its fluorescence. This test is commonly used by gemologists and jewelers to verify the authenticity of diamonds.

In conclusion, using diamond testing tools such as a diamond tester pen, thermal conductivity tester, and UV light test can help you accurately determine if a ring is a real diamond. These tools are essential for anyone looking to buy or sell diamonds, ensuring that you are dealing with genuine gemstones.


In conclusion, knowing how to tell if a ring is a real diamond can save you from being scammed with fake stones. By using simple tests such as the fog test, the clarity test, and the sparkle test, you can easily determine the authenticity of a diamond. Remember to also consult with a professional jeweler for a more accurate assessment. With these tools and knowledge in hand, you can confidently shop for diamond rings and ensure that you are getting the real deal.

Share this post: