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  1. May 31, 2024 · A real diamond reflects white light extremely well, providing exceptional sparkle. Diamonds also reflect colored light, or fire, in magnificent fashion. If you compare a real diamond to a fake diamond like Cubic Zirconia, you are able to notice a drastic difference in the white and colored light sparkle that the real diamond gives off.

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    • Testing Mounted Diamonds. Use the fog test. Put the stone in front of your mouth and fog it like you would a mirror. If it stays fogged for a couple seconds, it’s probably a fake — a real diamond disperses the heat from your breath instantaneously and won't fog up easily.
    • Testing Unmounted Diamonds. Look at the stone's refractivity. Diamonds sharply bend, or refract, the light that passes through them, resulting in their strikingly brilliant appearance.
    • Testing Professionally. Ask for a heat probe test. The tight, evenly-packed crystalline structure of diamonds makes them disperse heat quickly; thus, real diamonds will not heat up easily.
    • Telling Natural Diamonds from Other Stones. Recognize synthetic diamonds. Lab-created or synthetic diamonds are "real" but they are not "natural".
    • The fog test. Diamonds are excellent thermal conductors. They allow heat to pass through them rapidly. If you blow on a diamond as if you are trying to fog a window, the fog will dissipate from a real diamond almost instantly.
    • The water test. Real diamonds are incredibly dense and will sink in water. For this test, all you need is a glass of water. Fill a drinking glass with tap water and drop your stone in the glass.
    • Look for clues on the gem and setting. If the diamond you want to test is already set in jewelry, the setting – or even the gem itself — can offer some valuable clues.
    • The ultraviolet light test. If you have an ultraviolet (UV) light, it can provide some clues about whether you have a real diamond or a fake. Many (but not all) real diamonds will glow blue under UV light.
  2. If it is a real diamond, it will sink due to its high density. If it floats, it is a fake. Understanding Settings, Metals & Mounts . Another way to tell if a diamond is real is by examining the setting. A real diamond should always be set in high-quality metals such as white, rose, yellow gold or, of course, platinum. Look for mounts which ...

  3. Aug 9, 2024 · Tell-Tale Signs: How to Spot a Fake Diamond. Now, let’s explore some practical methods to distinguish between real and fake diamonds. While professional tools provide the most accurate results, these techniques can be helpful for initial assessments. 1. The Fog Test. Real diamonds disperse heat rapidly. Try this:

  4. Apr 12, 2023 · How can you tell if your diamond is real or fake? That's the topic of today's guide. Specifically you'll learn: 10 different easy (and fast) tests to check if your diamond is real; The #1 best fake diamond test; What to look out for during these tests; And much more

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  6. 2 days ago · A real diamond is a superior conductor of heat, while fake diamonds, such as glass or cubic zirconia, are not. The diamond tester can determine how well the stone conducts heat, giving you an immediate answer about whether it’s real.

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