How to Spot Fake Diamonds

Many people always question whether the diamond they just purchased is real or not. After spending so much money, it’s almost impossible to not be a little apprehensive about how authentic the diamond is. Whether the diamond comes with a GIA certificate or not, there are several ways to test the diamond to see if it is authentic.

Use a Loupe Magnifying Glass

A loupe is a 10x magnifying glass that jeweler’s use to see inclusions in gemstones. All diamonds have inclusions and internal quirks. One determining factor between a fake diamond and an authentic diamond is that most fake diamonds are created to look flawless.  Use a loupe to check for inclusions.

Take a Fog Test 

This test does not refer to taking your diamond out on a foggy day, but rather creating a “fog” around the stone by blowing on it. Real diamonds do not retain heat well, but fake diamonds will get foggy just like a phone screen.

UV Light Test   

The majority of  real diamonds will emit a blue glow under ultraviolet lights such as black light. Fake diamonds, on the other hand, will glow other colors or not at all. It’s worth a try!

Drop it in Water 

Loose diamonds are dense so they should sink to the bottom when dropped in a glass of water. False diamonds will float or not sink as quickly because they are less dense.

The Weight Test 

CZ’s are much heavier than diamonds. This gets difficult to measure when the stone is in a ring setting, of course, but experts can identify weight discrepancies. Take your diamond to an expert if you’re not sure how to weigh it.