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8 Ways To Identify A Fake Diamond [Infographic]

A diamond can be a girl’s best friend but can also be her worst enemy...that is, if the stone turns out to be fake. Whilst the only way to guarantee the authenticity of a stone is to have it appraised by an independent gemologist, knowing the warning signs of a fake is often a great indication as to whether it needs a visit to a professional.

Here are 8 ways to identify a fake diamond, providing a simple and straightforward process to help spot the warning signs:

How To Identify A Fake Diamond

  1. Check The Certification
    Any genuine diamond should come complete with a certificate from a grading authority to verify its authenticity. Such a certificate should include everything which needs to be to known about the stone, including the cut, carat, clarity, colour and more.
  2. Check The Reflection
    The reflection of a genuine diamond will have different shades of grey and white on the inside and light rainbow colours on the outside. A fake diamond will have rainbow reflections on the inside.
  3. Do The Fog Test
    Breathe on the diamond and watch how quickly the fog clears. A genuine diamond can disperse heat rapidly and, as such, the fog should clear almost instantly. Fakes will usually take at least 2 seconds to clear.
  4. Check The Refractivity
    The refractivity is a diamond’s ability to bend light which passes through, contributing to its brilliance, something which cannot be replicated. Place on a newspaper. With a fake, it will be possible to read the print through the diamond but not with a genuine one.
  5. Do The UV Test
    The majority of diamonds have a light blue hue when under UV light. Test a diamond by using a UV lamp to look for this blue hue, taking note that not all diamonds will have this. As such, not all stones without this characteristic will be fake.

  6. Check For Imperfections
    Using a loupe, check for imperfections. A fake stone will be perfect, whilst a genuine diamond will display a number of imperfections due to the fact that it came from nature. These imperfections are known as inclusions.

  7. Do The Sandpaper Test
    Rub the diamond with sandpaper and look to identify whether it has scratched the surface. A real stone will remain perfect after being scratched given that it’s one of the world’s hardest materials yet a fake will scratch up.
  8. Check The Setting & Mount
    A real diamond is unlikely to be set in a cheap metal and this can be one of the easiest ways to identify a fake. You would generally expect to see a diamond set in either real gold or platinum yet a fake in a cheaper, inferior metal.

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