How can you tell if a diamond is real?

Diamond is an expensive purchase, so one needs to dot the i’s and cross the t’s before sealing the deal. Even if you already have the diamond, you might still want to check its authenticity to know if you have a valuable asset. Diamonds have many ‘fake’ forms. While lab diamonds are not fake per se, as they have similar properties as natural ones, they cost way less than their counterparts.

Obviously, you would not want to pay for a natural diamond and get something way less expensive instead. Let’s hear from Emily of Fergus James on how you can assess if you got the real deal by yourself.

Fog Test

Breathe on the diamond and see if the fog stays on it. Diamonds are good conductors of heat and disperse it instantly when exposed. If your diamond is real, the fog will dissipate quickly. Otherwise, it will remain on the gem for many seconds. If you keep breathing on it for long, you will see condensation forming up on the fake one while the real one will remain clear regardless of how much you puff on it.

However, bear in mind that the veracity of these tests is not certain. You still need the help of a professional to confirm if your diamond is valuable or not.

Water Test

A few elements like cubic zirconium can pass other home tests, almost all but this one. Just fetch a drinking glass filled more than half with water. Drop loose diamonds in the glass. If its sinks, it is real, as natural diamonds have a higher density. If floats, be it at the surface or underneath, it is not a real one.

Setting and Mount

If the diamond is mounted, observe the setting and mount of the ring. The real diamond has a high price tag, so it will entail high-quality metals and expensive settings like white gold with a halo setting. However, pay attention to the setting to see if the setting is actually the one described by the seller.

Peek inside to look out for markings. Markings like Plat and PT denote platinum and numbers like 770 and 950 indicate gold or platinum. If there is a CZ engraving or stamp, the stone is cubic zirconia. However, bear in mind that this test is the least reliable, as the use of precious metal does not guarantee the use of a real diamond.

UV Light Test

Place your diamond in a UV light and see how it glows. If it has a blue-colored glow, it is a real diamond. However, this test is also an unreliable one because many diamonds do not glow under UV light. So, this test cannot definitely point out a fake diamond. It is better to consult a diamond expert to know if your jewelry is authentic and valuable.

Scratch Test

Diamond is one of the strongest materials in the world. Not only that but it can also cut through glass. A scratch test would help you identify if your diamond is real or not. Get a plate glass and the diamond. The diamond should be unmounted and preferably loose. Place the glass on a flat platform and scratch its surface with the diamond.

If it succeeds in scratching the glass, your diamond is likely to be real. It is one of the effective tests to see if your diamond is real, as other stones do not have the same effect. However, you should keep in mind that the gem might get damaged in the process.

Expert Methods to Assess Diamond

While these home tests can give an idea if your diamond is real or not, they are not accurate every time. Here are a few methods experts use to check the authenticity of diamonds:

Loupe Test

A diamond expert has a special magnifying glass called loupe for checking different gemstones. The loupe is used to find imperfections and blemishes in the diamond. Notably, diamonds do have small imperfections while other elements are constructed perfectly.

Many people believe that one can borrow a loupe and check their stones on their own. However, a layman would find it difficult to handle the loupe and use it accurately in finding inclusions.

Thermal Conductivity

Gemologists also use a thermal conductivity meter to check the authenticity of a gemstone. Diamonds are good heat conductors, so they disperse heat instantly when exposed. If a stone disperses heat slowly, it means the diamond is not real.