Does this mean that diamonds have some iron or any other magnetic materials inside or the jewelers have ripped us of? A: Pure diamond is not magnetic. If you're lucky, your mum may have gotten a real diamond with some small magnetic impurities.
Get a glass full of water and simply drop your diamond into the glass. If the diamond is real, it will drop to the bottom of the glass due to the high density of the stone. If it's a fake, it will float on the surface of the water.
Most of the magnetism of the natural stones is due to surface contamination, which can only be removed by rigorous acid cleaning. After cleaning, the natural diamonds were not only less magnetic than all of the synthetic stones, but they were also more resistant to demagnetization.
Using a magnet is a good way of identifying whether your jewelry is authentic or not. If your jewelry sticks to the magnet, it may be fake or not pure gold — this is because real gold is not magnetic at all, and even with a strong magnet it will not be attracted.
Water Test
If you have a loose diamond to test, fill a regular glass about ¾ of the way full with water. Gently drop the diamond into the glass. If the diamond sinks to the bottom, it's real. If it floats at the surface or just underneath, it's likely a fake.
1) Water Test
First, using a standard drinking glass fill it to about three-quarters full with water. Next, gently place the loose diamond into the glass of water. Watch closely: a genuine diamond, due to its high density, will sink to the bottom, a fake stone will float underneath the surface or at the very top.
Using cold water is a much simpler and safer way to test the validity of a diamond. If you place the stone into water, a real diamond will sink to the bottom due to the density. Fake diamonds are far more likely to float or bobble around.
As straightforward as it sounds, fill a glass of water at home to roughly three-quarters full. Separate the stone so that it is loose, and drop it into the water. Diamonds are highly dense and a genuine gem will sink to the bottom – every time. If it hovers to the surface or only partially sinks, then it is a replica.
27, 2013 – Owners of Android phones and tablets like the Kindle Fire and Samsung Galaxy can now benefit from GIA's (Gemological Institute of America) free interactive diamond app for consumers and retailers, available in both English and Simplified Chinese.
9. How to Tell if a Diamond is Real using Sunlight. The way that diamonds reflect light is unique: the inside of a real diamond should sparkle gray and white while the outside should reflect a rainbow of colors onto other surfaces.
Perform a scratch test. Scrape your gem against corundum and if it makes a scratch, you've got a real diamond on your hands. Diamonds have a density of 3.5 - 3.53 g/cm3, which you can test by dividing the weight of the stone by the weight of the stone suspended in water. Or, take your gem into a professional.
True diamonds have high density and should quickly sink to the bottom of the glass. Fake diamonds are not as thick, and therefore, more likely to float in water. This test is not always foolproof. Some materials that make up fake diamonds, such as cubic zirconia and moissanite, can sink if they are heavy enough.
If you're serious about finding out whether your diamond is real or fake, you can put the stone through a fire test. Use a lighter to light the stone for approximately 30 seconds before dropping it in cold water. If it's a real diamond, the stone will remain unharmed, but if it's fake it will shatter to pieces.
You will see that the diamond has white or silvery sparkles only. However, cubic zirconia will give out colourful sparkles such as red, yellow or blue. Another important differentiating feature between these two stones is that a diamond possesses sharp facets, whereas a zirconium does not have sharp facets.
Appearance. Cubic zirconia tends to be completely colorless, while diamonds can range in color from completely colorless to yellow or brown and are graded on a scale from D to Z, where D signifies a completely colorless stone. Since cubic zirconia is man-made, manufacturers control the whole process.
Then rub the diamond vigorously against the sandpaper. It's that simple. If your stone scratches, it's not real. You will end up with a ruined stone, but you shouldn't worry too much about that since it is not, in fact, a diamond (and probably not worth much).
The Fog Test
Diamonds are made completely of carbon, an organic material. They conduct heat so if you blow on a diamond the foggy surface will dissipate immediately. If you blow on a stone and the foggy surface sticks around, then the stone isn't a real diamond.
Diamond testers are always accurate. However, the thermal diamond testers can be faulty when testing moissanite because it has a similar heat conductivity rate to natural diamonds. The other testers will work because moissanite has different electrical conductivity rates than natural diamonds.
A: Pure diamond is not magnetic. If you're lucky, your mum may have gotten a real diamond with some small magnetic impurities.
What Kind of Metals Are Magnetic? When these metals are combined with gold, it may make the piece (gold jewelry or gold bullion/nugget) magnetic. What metals are attracted to magnets? Cobalt, iron, nickel, neodymium, samarium, and gadolinium are all magnetic metals.
Most diamonds will have a blue-colored glow, but if you see the slight green or yellow fluorescence instead, you'll need to seek the opinion of a professional jeweler as this may mean your stone is not genuine. Although this is not 100% sure, it would be best to have it checked by a reputable jeweler.