How to Identify If a Diamond Is Real or Fake

How to Identify If a Diamond Is Real or Fake

Diamonds have long held a special place in our hearts. Beyond being a girl's best friend, they symbolise love, elegance and prestige. But with their high value and desirability, the market has seen a rise in fake diamonds masquerading as genuine.

In this article, we will explore the various methods and tests you can use to distinguish between a genuine diamond and a clever counterfeit. Let's dive right in!

Common Misconceptions About Identifying Fake Diamonds

Before we delve into the five best methods to identify real vs. fake diamonds, let's dispel some common myths:

The Sparkle Test

Many people believe the more a diamond sparkles, the more real it is. While genuine diamonds do sparkle, this test alone is not failproof, as imitations can also exhibit a brilliant shine.

The Price Tag

Assuming a high price automatically guarantees a real diamond is a mistake. Some clever imitations can command significant prices.

Top 5 Methods to Identify Fake Diamonds From Real

Now that we've cleared the air, let's explore the five best methods to identify fake diamonds from the real deal by focusing on genuine diamond features.

1. Visual Inspection

Visual inspection is among those diamond authenticity tests that provide a quick initial assessment based on appearance.


Genuine diamonds possess unique features that can be observed with the naked eye.

How to Perform:

  • Examine the diamond's overall appearance for a brilliant sparkle and fire. Real diamonds disperse light to create colourful flashes.
  • Use a jeweller's loupe or magnifying glass with 10x magnification for a closer look. Check for tiny imperfections or inclusions.

Interpretation of Results:

  • Brilliant sparkle and some internal imperfections suggest a genuine diamond.
  • A lack of sparkle or flawless perfection may indicate a fake diamond.

2. The Fog Test

Visual inspection is among those diamond authenticity tests that provide a quick initial assessment based on appearance.

The fog test is a simple yet effective way to identify real diamonds:


Genuine diamonds disperse heat quickly, so they won't retain fog. In contrast, fake diamonds may stay foggy for a longer time.

How to Perform

Breathe on the diamond's surface. If it clears instantly, it's likely genuine.

Interpretation of Results: 

If the fog lingers for a few seconds, it may indicate that the diamond is fake.

3. The Newspaper Test

This test helps assess a diamond's transparency and refractive index.


Real diamonds refract light and make the text underneath less readable.

How to Perform: 

  • Place the diamond on a newspaper with text. 
  • If you can read the text clearly through the diamond, it might be fake.

Interpretation of Results: 

If the text is significantly distorted or less visible, you're likely dealing with a real diamond.

4. The Refraction Test

Refraction is a key property of diamonds. Here's how you can test it.


Diamonds bend light differently from other materials, creating a distinctive sparkle.

How to Perform: 

  • Place the diamond on a piece of white paper with text. 
  • Observe the light entering the diamond; it should bend and sparkle.

Interpretation of Results: 

If the diamond doesn't display this distinctive sparkle, it may be fake.

5. UV Light Test

UV light can trigger fluorescence in diamonds. Here’s how to check for this property.


Real diamonds may emit a blue fluorescence when exposed to UV light.

How to Perform

Shine a UV light on the diamond and observe any blue glow.

Interpretation of Results: 

If the diamond exhibits a blue fluorescence, it is more likely to be authentic.

Remember, these tests are not foolproof individually, and it's best to use a combination of methods to verify your diamond authenticity. Additionally, when making a significant purchase, consider the importance of diamond certifications and gemological diamond analysis. These professional assessments are most accurate in determining a diamond's authenticity.


1. Can I visually inspect a diamond to determine its authenticity? 

Yes, a visual inspection can help you identify if your diamond is real or fake.

2. How does the scratch test work in identifying real diamonds?
The scratch test involves attempting to scratch the surface of the suspected diamond with another material, usually glass. Since diamonds are one of the hardest natural substances on Earth, they can scratch glass, making this test a simple way to identify genuine diamonds based on their exceptional hardness.

3. What should I look for in a diamond certificate or report to ensure authenticity? 
A valid certificate should be from a reputable lab and should detail diamond characteristics.



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