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Buying diamond jewellery, for most people, is not a routine activity. But can you tell whether a diamond is fake or real? And how do you recognise a real diamond? Knowing the authenticity of your diamond jewellery in advance is an important step. These are some more ways you can check the authenticity for yourself.
- What is a diamond and how is one made?
- How do I recognise a real diamond?
- What is the difference between a diamond and a brilliant?
- What is the difference between moissanite and synthetic diamonds?
- What tests are there to recognise a real diamond safely?
- How can I be 100% sure about the authenticity of my diamonds?
- Which diamond jewellery do you want to buy?
Most viewed diamond jewels
VeneziaFrom ￥ 38.670 (excl. VAT)
1.20 carat diamond eternity ring in red goldFrom ￥ 17.950 (excl. VAT)
XO earrings in red gold with small round diamondsFrom ￥ 4.770 (excl. VAT)
1.00 carat solitaire halo ring in white gold with round diamondsFrom ￥ 19.620 (excl. VAT)
1.00 carat solitaire diamond ring in white goldFrom ￥ 13.820 (excl. VAT)
A diamond's cut can also make it clear whether it is real or fake. If the top surface is cut straight, then you probably have a real diamond in your hands. Fake diamonds often show signs of wear because they are not as tough as real, hard diamonds.
A diamond is a chunk of coal that did well under pressure
1. Weight testIf you have both an fake diamond and a real one, you only have to compare the weight.
2. Writing testIf you have just a single unset diamond, place it upside down on a newspaper or book. The writing will not be legible if the diamond is real, because the high refractive index (not to be confused with reflection) causes dispersion. With quartz or glass you can still see the writing.
3. Colour testCheck the gemstone colour under ultraviolet light, such as the UV light from a tanning bed. Diamonds are often fluorescent, meaning the stone will glow blue under UV light. Bear in mind that there are also diamonds which do not fluoresce, so this test does not apply to all diamonds.
4. Breath testHold the diamond up in front of your mouth and breathe out. Real diamonds won't fog up, because the heat dissipates across the stone instantaneously. Make sure the diamond is not dirty or greasy, otherwise the precious stone will mist up. This is also known as the fog test.
5. Water testIf you drop the diamond into a glass of water, a real diamond will immediately sink to the bottom because of its weight and density. An fake diamond will float halfway down the glass or sink slowly.
6. Warmth testWarm the loose stone for 30 seconds with a heat source (such as a lighter) and then immerse it in a glass of cold water. No problem for a real diamond, but an fake diamond will crack.
The certificate not only guarantees value for money, but also means it is easier to sell the jewellery later on should it be an investment diamond. Have you bought a diamond which you are not sure is authentic? Then you can have the precious stone tested for authenticity by a diamond expert.