Is My Diamond Real or Fake

Many people like to be able to check their own jewelry to see if their diamond is real. There are a few things that you can do yourself to help determine a diamond's authenticity, however, to a get a true verification you should take your jewelry to a qualified jeweler or gemologist and allow them to test your diamonds.

Cubic Zirconia (CZ) or Diamond?

One of the easiest do it yourself tests to help determine if the diamond you have is real of a CZ is the dot test. Since diamonds reflect light back out through the table (top surface) and CZs are transparent, you can perform a visual test.

  • Step One: The first thing you need to do is draw a small dot on a clean piece of paper.

  • Step Two: Next place the diamond face down on the dot.

  • Step Three: Now looking through the bottom of the diamond you should not be able to see the dot. The image should be a distorted mess. If your stone is a CZ the dot will become a circle that is clearly visible.

  • To test if your diamond is real or fake - draw a dot

    The Dot

  • To test if your diamond is real or fake - place the stone over the dot - a CZ will show a clean sharp circle

    The dot through a CZ

  • To test if your diamond is real or fake - place the stone over the dot - a diamond will distort the dot

    The dot through a diamond

My Diamond Glows Under Black Lights!

One concern that many people have is when they see their diamond "glow" when under a black light or in a bar. Some people claim that this means the diamond is real, while others claim that this means the diamond is fake. Neither is the case all of the time. Real diamonds can glow under black light, or ultra violet light, this is called fluorescence.

Fluorescence is a characteristic of natural diamonds that is measured and declared on all major lab reports. Fluorescence can vary in intensity from not at all visible or very strong where the diamond simply glows bright colors. This is not a defect, and it in no way affects the value of your diamond, it is simply a property of your diamond. Many people seek out these types of diamonds especially for this feature.

My Stone Can Scratch Glass!

Many gemstones can scratch glass. Glass has an average hardness of 5.5 on the Mohs' scale for hardness. A diamond has a hardness of 10. A CZ has a hardness of 8.5. Other gemstones harder than glass include Sapphire, Amethyst, Quartz, Aquamarine Ruby and Emerald.

By trying to scratch a piece of glass with you gemstone as a test, all you are doing is scratching glass and risking damage to your gemstones. This is not a good test to determine if your diamonds are real.