How to Tell If a Diamond Is Real?

August 01, 2023

Diamonds, often considered a girl's best friend, are not just beautiful gemstones but an investment in eternal love and cherished memories. Whether you're on the hunt for a stunning diamond ring to mark a special occasion or want to ensure the authenticity of the precious diamonds you already own, it's crucial to navigate this glittering world with vigilance and knowledge. But how can you avoid getting duped by a fake stone? Here is a primer on "How to Tell If a Diamond Is Real."

For those not well-versed in a diamond's intricate structure, distinguishing a natural diamond from a fake can be quite challenging with the naked eye alone.Of course, the best way to know if a diamond is real is to consult an expert jeweler or appraiser. However, you can try to set your mind at ease by following one of these at-home tests. Remember, these will give you a good clue, but none of these tests are foolproof.


Real Diamond vs. Fake Diamonds: Which Stones Fool People?

It is a common misconception that only one kind of fake diamond exists. In reality, numerous stones can deceive the untrained eye and be mistaken for genuine diamonds. Among these are natural white sapphires, white topazes, and colorless zircons, which can be easily confused with their sparkling counterparts. Furthermore, lab-created stones such as YAG (yttrium aluminum garnet), GGG (gadolinium gallium garnet), CZ (synthetic cubic zirconia), and synthetic moissanite can all mimic the allure of natural diamonds.

While some of those gemstones have value, if you're investing in a real diamond, you want to be sure you get what you pay for. Keep in mind that testing loose diamonds is more effective, as settings can be used to hide crucial indicators.

Let's explore ten tests to help you distinguish the genuine gem from the rest.


How to Tell if a Diamond Is Real at Home

The Water Test: Begin by filling a glass with water and gently dropping the diamond into it. A real diamond will sink to the bottom due to its high density, whereas most fakes will float or remain suspended near the surface.

How to Tell If a Diamond Is Real glass test


The Fog Test: Breathe warm air onto the surface of the diamond. A genuine diamond will disperse the heat quickly, leaving no fog or residue. In contrast, a fake diamond will retain the fog longer.

The Heat Test: Heat can be detrimental to certain gemstones, but diamonds endure without any damage. Hold the stone with tweezers and pass a flame near it for around 30 seconds. A real diamond will remain unaffected, while a fake may crack, shatter or get discolored.

The Black Light Test: In a dark room, hold the stone in front of a black light (UV light). Most real diamonds exhibit a blue fluorescence. However, it's likely fake if the stone emits a green, yellow, or gray glow.

The Dot Test: Draw a black dot on clean white paper and place the diamond face down over the dot. You've got a fake stone if you can see the dot through the diamond. Since real diamonds refract light, you shouldn't be able to see anything through the stone.

The Newspaper Test: This is similar to the dot test. Under bright lights, place the flat side of the diamond on a newspaper. If you can see any of the letters, the stone isn't a real diamond.

how to tell if a diamond is real newspapper test


The Sparkle Test: Hold the stone in front of a light and observe how the diamond sparkles. Genuine diamonds have exceptional brilliance, with light reflecting off multiple facets. Counterfeit stones may lack this captivating sparkle and appear dull.

Check the Setting & Mount: Examine the diamond's setting and mount for any markings. This is not a foolproof test, but jewelers don't set expensive stones in cheap metal settings. For example, you're probably not looking at a real diamond if you don't see a stamp for gold (14K, 18k) or platinum (PT).

Use A Loupe or Magnifying Glass: A jeweler's loupe is like a small magnifying glass – either will work fine for this test. Inspect the diamond's surface through a magnifying tool and look for imperfections. Real diamonds often have imperfections or flaws, and while there are some flawless diamonds, those tend to sell for millions of dollars. If the stone looks too perfect, it's a fake diamond.

Use A Diamond Tester: For a more sophisticated approach, invest in a diamond tester. This tool measures electrical conductivity to identify if the stone is a real diamond or just masquerading as one. However, moissanite shows the same result as a real diamond, so you'll need to perform additional tests to be sure.


Sparkle With Confidence Knowing Your Diamond Is Real

While these methods are helpful for initial evaluations and will work for your fancy color diamonds, too, the only way to guarantee the quality and authenticity of a diamond is through a professional jeweler or appraiser. At VMK Diamonds, we have the expertise and equipment to discern even the most convincing imitations. This ensures you make a wise investment in a true gem that will sparkle alongside your most cherished memories for a lifetime.

With the help of VMK Diamonds, you'll be well-equipped to ensure the diamonds you invest in are as authentic and enduring as the love and memories they represent. Be cautious, be wise, and let us guide you through the glittering world of diamonds, making it a joy rather than a source of confusion.

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