how do i find out if a Diamond is real or not?

we found them in the bottom of a box of things from a estate sale ..they look real...

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  • 1 decade ago
    Favorite Answer

    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.

    PS: Do NOT scratch or smash the diamond against ANYTHING! If you do that, it will destroy or ruin the diamond rather it is fake or real!

  • Anonymous
    1 decade ago

    Take them to any reputable jeweler and they can look at them and tell you in a second.

    DO NOT scratch glass with them. That will ruin the diamond if it is real. It can actually damage the diamond!

    http://www.diamondcuttersintl.com/diamond_educatio...

    "I do not recommend scratching

    jewel grade or cut diamonds on anything (like a mirror) or with another diamond. There may be planes of weakness in the natural crystal structure and the diamond can split."

    http://www.newton.dep.anl.gov/askasci/env99/env254...

  • Ego
    Lv 6
    1 decade ago

    Hardness test - Many minerals, including diamond, can scratch glass.

    More reliable is a density test. Measure stone's volume by immersing in liquid in graduated cylinder. Then weigh stone. Density = weight / volume. If it matches diamond, then you are assured it's real.

    Some optical tests are useful: Does the stone flouresce under certain UV light?

  • Anonymous
    5 years ago

    Your ring is Blue Topaz. The Blues in the Topaz are the most popular. This gemstone comes in many different colours. Sky Blue Topaz, Swiss Blue Topaz and London Blue Topaz. It is not a diamond. Had it been a clear Topaz which is also available, it would be mistaken for diamond as it has a unique crystal structure that makes it dense.

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  • 1 decade ago

    Light refracts differently when shined through glass, cubic zerconia, and diamonds. If you take it to a jeweler, they will be able to take a look at it and tell you exactly what they are and give you an apprasial.

  • 1 decade ago

    Dear reader,

    NO scratching, hammering at all !!

    Bring the gem to a good jeweler or a gemological lab. They will verify and inform you if it is a diamond or not.

    Good luck

    Source(s): I am gemologist and diamantaire
  • Anonymous
    1 decade ago

    Lab grown diamonds will not cut glass, an easy way is to rub an diamond and try to cut/scratch a piece of glass (mirror works well)

  • Anonymous
    1 decade ago

    Spit on it. Once your saliva touches the diamond, it will form a chemical reaction with the diamond. If your spit evaporates into gas, then it's real. If your spit turns the diamond into black matter, then it's fake.

  • 1 decade ago

    burn the diamond till 3500 degree if diamond sublime than it is a pure diamond or u can cut the glass or its should reflect

    Source(s): diamond student
  • 6 years ago

    Apparently it's not as easy as it once was. The quality of synthetic stones has improved so much, that it is virtually impossible for the average person to tell the difference.

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