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How Can I Tell if my Diamond is Real?

Updated on July 15, 2011

How Can I Tell if my Diamond is Real?

A question that I get asked a lot is, "how can I tell if my diamond is real?" Learning how to tell a real diamond from a fake one is a process, but it is well worth it in the end. There are a number of easy tests that can be performed and you don’t need to be an expert to conduct them.


Breathe hot air on the diamond just like you would on glass to fog it up. If it clears up right away, then it is likely a diamond, but if it takes a number of seconds to clear up, it is probably a fake. The problem with the fogging technique is that even certain capped cubic zirconium and moissanite will pass.


Also, if the fake diamond is a cubic zirconium, then it will weigh almost twice as much as a real diamond. You can also tell if a diamond is a cubic zirconium by looking for the initials CZ on the stone. If you are offered a huge diamond at an exceptionally minimal price, chances are, it is too good to be true although this is not always the case.


If the diamond you’re interested in is not mounted, turn the stone upside down on a newspaper. Because diamonds refract light, the diamond is probably a fake if you can see through the stone and read the actual print of the newspaper.


Just about all diamonds have a small tinge of color to them so if you see a diamond that is clear, proceed with caution.

*Additional tip

When in doubt, buy a certified diamond from a certified diamond specialist or store. If you’re making the purchase online, you can go to websites like the Better Business Bureau or a review site such as IVouch to see what other customers have said about the online store in question. If you already have possession of a diamond and question its authenticity, have it certified. Only genuine diamonds can become certified by a licensed jeweler.

The next time someone asks you, "how can I tell if my diamond is real?" tell them about some of these easy tests.


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    • HalieTep profile image


      8 years ago

      Wow! Great tips. I really enjoyed reading your hub. Thanks for sharing!


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