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5 Simple Ways to Spot Fake Diamond
A loupe is a magnifying glass that you can buy at any jewelry store and will let you take a closer look at your gem and setting.
“When you’re looking at a diamond, there are a few things you’ll notice,” “First, the majority of diamonds are made in nature so that means you’re going to see some imperfections in the carbon. A fake stone would be perfect – absolutely perfect.”
2. Rub sandpaper against the stone.
This is an easy test since diamonds are one of the world’s hardest materials and won’t be scratched by the rough surface. “If it’s a diamond, it will remain perfect, if it’s a cubic zirconium, it will scratch it up,”
3. Do the fog test.
Breathe hot air on your diamond the same way you would if you were fogging up a bathroom mirror.
“A fake diamond will fog up for a short period of time whereas a real diamond will not because it won’t retain the heat,”
4. Hold it in the light to see how it sparkles.
The way that diamonds reflect light is unique: Inside the stone, the diamond will sparkle gray and white (known as “brilliance”) while outside of the gem, it will reflect rainbow colors onto other surfaces (this dispersed light is known as “fire”).
A fake diamond will have rainbow colors that you can see inside the diamond.
5. Look at the stone’s refractivity.
Diamonds are so sparkly because of the way they refract and bend light. Glass, quartz, and cubic zirconium may mimic a diamond’s brilliance, but they have much lower refractive indexes.
This means that if your stone isn’t in a setting, you can place it over a newspaper and the light will scatter inside the real diamond and prevent a black reflection. A fake diamond will let the black shine through, and you may even be able to read a word depending on the size of the fake stone.
If your diamond is mounted, make sure you can’t see through it to the mount itself – that’s a very bad sign.
Once you’ve done all your home tests, it’s time to take your jewels that could be diamonds to a gemologist.
Tips by Angie Ng – Creative Director of Kelvin Gems, Crafted by Angie, Elegant Jewellery Studio