5 Ways To Tell If Your Diamond Is Real

5 Ways to Check if Your Diamond is Real

Coveted for their rarity and beauty, diamonds are best known around the world for their sparkle, fire, and brilliance. Used for centuries in engagement rings, diamonds are iconic representations of love. But looks can be deceiving—there are many crystals out there that look very similar to diamonds but without the quality and durability of the real thing.

By just looking at a diamond or a crystal, it’s nearly impossible to tell if it is real or fake. Imitation diamonds, like cubic zirconia or zircon, oftentimes look nearly identical to actual diamonds—despite the fact that they are composed of totally different materials. But there are a few tips and tricks that will help you determine whether or not your stone is the real thing.

Learn more about how to tell if a diamond is real or fake, and test your own gemstones right at home.

1. In water, diamonds sink.

As the hardest gemstone known to man, diamonds are also extremely dense. This makes them durable and great for everyday wear but also makes them heavy. Because of their weight and density, diamonds sink when they’re dropped into a glass of water. Unlike diamonds, crystals are not nearly as dense. That means they tend to float just under the surface of the water or halfway in the glass.

To test your own stone, fill a glass of water. Drop the stone into the glass—if it sinks, you’ll know your diamond is real, but if it floats it means it’s an imitation. 

2. Diamonds don’t shatter when exposed to high heats.

Because it takes millions of years to form diamonds below the earth’s surface, they are exposed to massive amounts of heat and high pressure. As a result, diamonds are incredibly durable and aren’t susceptible to damage from high heat. Fake diamonds, on the other hand, cannot handle heat nearly as well because they are made of weaker materials.

To test the authenticity of your diamond, heat it with a flame—like a lighter—for 30 to 45 seconds. Be sure to hold the stone with tweezers or another tool to protect your hand. Once it’s heated, drop the stone into a glass of cool water. Real diamonds will simply fall to the bottom, while less durable, fake diamonds will shatter.

3. All diamonds have small, natural imperfections.

Because diamonds are naturally occurring, they all have some imperfections that were created as they formed in the earth. Alternately, man-made crystals are made to be perfectly smooth on both the inside and outside. That means they don’t have imperfections, known as inclusions, like real diamonds.

To tell the difference take a magnifying glass and inspect your gemstone. In good lighting, you should be able to see tiny imperfections throughout the stone if the diamond is real. If you don’t see any imperfections, it likely means that the diamond is not real.

4. Real diamonds turn blue under a black light.

If you have access to a black light, you can tell if a diamond is real very quickly. In a dark room, turn on the black light and hold up your stone. A large percentage of real diamonds turn a shade of blue under UV lighting because of the minerals inside the stone. Fake diamonds, on the other hand, will light a yellow, grey, or green shade. This drastic difference in fluorescence makes it easy to tell the difference between a real or fake stone.

5. Real diamonds don’t fog up as long.

If you take the stone and breath on it—whether it’s real or fake—it will fog up, just like a mirror. The difference, however, is in how long the fog lasts on the stone’s surface. With real diamonds, the fog will disappear quickly because diamonds conduct heat. This heat ensures that the moisture doesn’t stay on the surface long. Fake diamonds, however, can’t conduct heat so they will stay fogged up for several seconds. If you notice that the fog is long-lasting, it’s possible that the stone is fake.

Top Quality Diamonds from Finer Jewelry

When you purchase your diamond from Finer Custom Jewelry, there’s no need to question whether the stone is real or fake.

Finer Jewelry is changing what it means to shop for diamonds. Making custom-designed jewelry of only the highest quality, Finer Jewelry’s diamonds are only the finest GIA-certified stones. With a wide array of carats, color, cuts, and clarity, there is a diamond that is perfect for every ring and every proposal.

With better quality and better prices than most traditional jewelers, Finer Jewelry is putting its customers first. Schedule a consultation with our team today to experience a more modern diamond-shopping experience.