We are all interested in how to tell if a diamond is real or fake. There are several tests to find out, but the best way to know for sure is a diamond certificate. However, if you don’t have a grading report, you may try some alternative ways to check the authenticity of your diamond.
My Stone Can Scratch Glass: Does It Mean It’s a Real Diamond?
Diamonds can scratch glass, that’s true. However, a lot of gemstones other than a diamond that are harder than glass can still scratch it.
Which is why, even if your diamond is fake, it will still pass the scratch test as long as it’s made of the material harder than glass.
Real Diamonds Distort Light
A real diamond bends light and you won’t be able to see its bottom when looking through the top.
For example, if you place a loose diamond over a printed text, you should not be able to see the symbols clearly through the stone if it’s a real diamond.
However, if the diamond has an atypical cut, this test won’t be reliable.
Real Diamonds are Heat Resistant
Real diamonds won’t be easily heated up.
Hold the diamond in front of your mouth and breath on it. If the diamond is real, the fog should disappear right away. If there is still residual moisture, then the stone is probably fake.
Real Diamonds Must Have Imperfections
Almost all real diamonds have imperfections. If you take a look inside a real diamond using a loupe, you will see that even the clearest stone has some internal flaws.
Fake diamonds usually don’t have inclusions. If the stone is too perfect, most likely it’s not a real diamond.
What About Diamond Testers?
First of all, what is a diamond tester? Diamond testers are portable devices that test material for its thermal or electrical conductivity. They can indicate whether the stone is a real diamond based on its physical properties.
It’s important to mention that the tester that measures only thermal conductivity cannot tell a real diamond from moissanites as these two stones are very similar when it comes to interaction with heat. Testers that measure electrical conductivity are more accurate in this case.
Diamond Certificate: Best Proof of Authenticity
The surest way to know if a diamond is real or fake is to see its certificate. Always ask if a diamond is certified and read the document.
The most trusted certification authority is the Gemological Institute of America (GIA). If the stone in question has a certificate issued by the GIA, you can be certain that it is real.