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The safest practice when buying diamond jewelry is to go to a reputable jeweler, who will always advise exactly what you are buying. And when you buy a diamond over half a carat (50 points), you should always request an independent certificate from a reputable precious laboratory like GIA or a reputable valuer. That way you can always be sure that when you buy a diamond it will be genuine.

But what if you buy smaller diamonds, or find loose stones from a piece of heritage, how can you tell if they are genuine diamonds or not without going at very expense? Here are five rough and ready ways to help you tell if your diamond is a false or genuine article.

Printing test

Place your loose gemstone, the top side down (pointed upwards) on a newspaper so that it covers a bit of the print. You will not be able to see the print of the magazine through a genuine diamond. But you will be able to read the magazine through fake diamonds, like cubic zirconia.

Breath test

This test needs another gemstone for comparison with work. Breathe on the gemstone and note how long it takes for the breath to evaporate. Genuine diamonds repel water vapor noticeably faster than other gemstones, while false diamonds do not.

wear test

Diamonds are the hardest known natural substance on earth. So the flat facets and the sharp facade edges of a real diamond do not let go of time. However, fake diamonds such as cubic zirconia will show signs of wear or even damage along the facet edges.

Felprovet

Without it being a very rare flawless gemstone, genuine diamonds contain flaws. These may be colored spots of carbon, pointed feathers or white curled lines, or included crystals. Deficiencies are a sign of a genuine diamond. Imitations always have perfect clarity.

Refraktionstestet

Genuine diamonds and moissanites are the only two gemstones that can pass a thermal sample. However, you can still tell a true diamond easily from a moissanite with this test. The inner facets of a diamond break light into the gemstone better than almost all other gemstones. However, the moissanite breaks the light twice over. This means that when you look at a moissanite gemstone, the number of backsides appears double, giving a blurred double vision effect. This effect is absent in real diamonds.