How can u tell a fake diamond to a real diamond without taking it to a jeweler?

Question

Does a fake diamond cut glass like a real diamond?

Answer 1

It will scratch glass.

Coach

Answer 2

The only people who can authenticate a real diamond are certified gemologists specializing in jewelry. However, if you are browsing rings at a flea market and want to quickly assess whether a clear stone is probably glass, cubic zirconium, quartz, or leaded crystal, there are a few easy tests you can apply without any special equipment. These tests at least rule out recognizable imposters because they rely on the way a real diamond stone refracts light, conducts heat, and looks up-close. If the gem in question is loose and unmounted, try placing it over printing. Diamonds refract so much light that they will not work as a magnifying glass and you would see no lines, circles, or letters through them. Other clear stones like glass or crystal will reveal the print clearly. A similar test uses a small light, such as the one that comes with your key ring. If you shine the light through the stone and cannot see it on the other side, but only a bright halo around the rim, it is more likely to be a true diamond. Diamonds are also very good at conducting heat. Breathe on the surface of the stone and immediately check to see if it has fogged up. Again, quartz, glass, and cubic zirconium will stay hazy for a moment before the condensation dissipates, but you shouldn't be able to see any moisture on a true diamond. However, one rock, called moissanite, will also pass this test, so the best way is to get a complete thermal conductivity evaluation performed by a jeweler. Looking closely at the specks, ridges, and facets can also give you a clue into the identity of your gem. Diamonds do have inclusions, tiny bits of other minerals that got crushed into the diamond while it formed deep under the earth. However, if the facets have worn or rounded edges, bubbles, or if the gem looks rippled or pitted, it is probably glass. Those gems that are perfectly clear, with absolutely no inclusions, are probably quartz. Finally, some common sense measures can prevent you from getting pressured to purchase a gem that turns out to be something other than a diamond. It shouldn't be ridiculously inexpensive, or you'll get what you pay for. It also will usually be mounted in an "open back" setting, which means that you can see around the rear of the gem and the back surface isn't coated with any silvery substance. Although it's true that diamonds are the hardest organic substance on earth, the infamous test of scratching diamonds across glass or metal might just give you a damaged diamond. Even many gemologists cannot distinguish "real" diamonds from cultured diamonds. Cultured diamonds have been artificially manmade in a laboratory, not mined from mountains, yet they are chemically identical to those diamonds. Some companies are developing new kinds of identification methods for those who would like to purchase a mined diamond or for those that prefer a cultured one.

Answer 3

What do you mean by 'a fake diamond' ? A C.Z., or one of those new lab created diamonds, AKA moissanite? Moissanite diamonds are so similar to diamonds that they are often mistaken as real diamonds by professional jewellers. There are slight differances, but they are hard to see without a 10x jewellers loup. As for cutting glass, a diamond is the hardest substance known. Diamonds rate a hardness of 10 on the Mohs Scale, Moissanite a 9.5, widow glass a 5.5. So a moissanite diamond would easily etch glass.

Diamonds vs. Cubic Zirconium

While you have both a diamond and a CZ do these two tests...exhale on both and they will both cloud, one cloud will stay MUCH longer than the other. Then run a felt tip pen over both, on one the line will stay put and on the other the ink will bead up. Which is which? The ink will bead on the diamond, and the fog will remain on the CZ. Both tests are assuming the stone in question is mounted, if it's loose you can just weigh it. CZ weighs so much more than diamond it'll be obvious with any chart or gauge.

Or use a black light - diamonds will usually glow blue, cubic zirconia will glow mustard yellow.

P.S. Wikipedia is not a reliable source. It is editable by anyone, with nobody to check the facts of the post. Try and find a reliable source for your information. Ex. Donald Rumsfeld (ok, that part is a joke) but he is a good analogy to Wikipedia. (could say anything, nobody to answer to.)

Answer 4

Real Diamond Vs Fake Diamond

Answer 5

It is not that hard to cut glass, so I'm sure most fakes would also cut (scratch) glass. It would be absurd for an untrained person to claim they could tell the difference between a real and fake diamond.

edit: please don't think that because your stone cuts/scratches glass that it is a real diamond -- the people that keep telling you that this will show you a fake simply don't know what they're talking about. Glass is not nearly as hard as most people think. A chunk of quartz will also scratch glass - that doesn't make it a diamond.

Answer 6

Fakes Diamonds are CZ's (cubic zircona). A simple test to tell if it is fake or real is to draw a dot on a sheet of paper and place the diamond table faced down. (The flat end down). If you see a circle then it is fake. See the link attached with pictures and text on what to look for.

Answer 7

Manufactured diamonds (cubic zirconia) are very hard and will cut glass too (don't confuse with rhinestones which are glass or acrylic to simulate diamonds).
Although you can distinguish between rhinestones & diamonds yourself, you should go to a jewelor to distinguish between raw & manufactured diamonds

[edit] Diamond Substitute

Single crystals of the cubic phase of zirconia are commonly used as a substitute for diamond in jewellery. Like diamond, cubic zirconia has a cubic crystal structure and a high index of refraction. Discerning a good quality cubic zirconia gem from a diamond is difficult, and most jewellers will have a thermal conductivity tester to identify cubic zircona by its low thermal conductivity (diamond is a very good thermal conductor). This state of zirconia is commonly called "cubic zirconium," "CZ," or "zircon" by jewellers, but these names are not chemically accurate. Zirconium silicate (ZrSiO4), is the naturally occurring silicate mineral zircon. Its transparent form is also used as a gemstone, and its opaque form as a refractory.

Answer 8

Try this, fill a clear glass with about 1cm of water, drop the diamond in. A real diamond wil utterly dissapear, while a fake will remain slightly visible.

Answer 9

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Answer 10

ALL real diamonds have carbon flaws. If you were to look at it with a jewelers loupe, you could probably find a flaw in it. Fake diamonds are for the most part flawless.

Answer 11

A true diamond will cut glass; a fake won't.