Due to their dark color, black diamonds cannot be tested using standard diamond testers; thus leading many jewelers to mislead customers into thinking they possess real black diamonds when in reality it may be loose moissanite gemstone.
This article will present several at-home tests to validate the authenticity of black diamonds, in addition to those conducted only by professionals using loupes.
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The Water Drop Test
One of the easiest and simplest ways to assess whether or not your diamond is real at home is with a water drop test. This assessment works best with loose stones (diamonds in settings are ineligible). Simply fill a glass with regular water and gently drop your stone. A genuine diamond should sink to the bottom while its fake counterpart may float nearer or above its surface due to their increased density.
Black lights provide another method to quickly determine whether your gem is authentic by quickly and easily testing for fluorescence, an indicator of authenticity. A diamond with medium to strong blue fluorescence indicates it could possibly be real; otherwise, if its fluorescence reveals yellowish green or gray glow it is most likely not real.
Last, try scratching your diamond against a piece of glass to test its authenticity. While this method may not provide accurate results, it still may help clarify whether your stone is authentic – genuine diamonds will leave visible markings behind while cubic zirconia or moissanite won’t.
If you want a closer inspection of the stone, visit your local jeweler. They can file a GIA diamond grading report on it as well as provide advice on spotting real from fake diamonds.
Home tests that provide more definitive answers are the Newspaper or Dot Test. Both methods work equally well on any type of black diamond; however, loose stones tend to perform better with them than jewelry sets. For the Newspaper Test, simply place your diamond face down over text from a newspaper; if any letters can be read through its surface that would indicate its fakery; to perform the Dot Test you draw a small dot and place your diamond over it with its flat side facing downward; if it can seep through then its likely genuine.
The Newspaper Test
The Newspaper Test is an effective and quick way to determine whether a black diamond is genuine at home. Simply fold a piece of paper in half and lay it on top of the stone – if it moves around on top of or stays still against it, chances are it is probably fake; but if it sinks below, this indicates real gemstone as diamonds have high density which causes them to sink at surface liquid levels such as water or other liquids.
If you can’t conduct either the Water Drop Test or Dot Test on your own, take your gemstone to a jeweler and ask them to verify its authenticity. They can use weighted measurements of the stone against records for verification; this step is particularly crucial as fake gems usually weigh more than genuine ones.
Utilizing light sources when inspecting gems is another excellent way to determine their authenticity. A genuine diamond should glimmer and sparkle when exposed to light; this sparkle comes from its microscopic imperfections known as inclusions – hence why many prefer diamonds with visible inclusions over flawless ones.
Real diamonds must also be resistant to heat. If you hold one against a flame for 30-40 seconds before dropping it in cold water, real stones will retain their shape whereas imitation ones shatter; this is because fake stones are composed of weaker materials which cannot withstand rapid expansion and contraction caused by temperature changes.
Magnifying glasses can also help you examine the surface of a stone more closely. A magnifying glass will enable you to more clearly discern any minor ports and scratches on its surface, since real black diamonds usually feature such signs; any smooth black diamond is more likely to be fake. Furthermore, fake black diamonds do not reflect light well when placed under bright lights – any piece which appears dull is most likely not an authentic natural stone.
The Dot Test
Black diamonds may be harder to detect as genuine than their yellow and white counterparts due to being set in precious metal settings such as gold or platinum, with any 10K, 14K, 18K stamps found inside the ring indicating their authenticity. If any precious metal stamps are missing then this could indicate it has likely been made from fake material.
Black diamonds are well known for their inclusions, which create their characteristic rough and imperfect appearance. As a result, scratches and nicks on black diamond jewelry are quite common – though real black diamonds tend to be rarer and therefore more expensive; so if you find one selling at an extraordinarily discounted price beware: it could be fake.
Fog testing can be an easy and effective way to verify if a black diamond is real or not, and to conduct it simply hold it against your breath and watch as it fogs up from heat and moisture in your breath. An authentic stone will quickly clear itself away while fakes may take longer for it all to dissipate.
Dot Test. An easy way to verify whether or not a black diamond is real is the Dot Test, whereby a dot is drawn on paper and placed against which your diamond with its flat side down is placed against. If it can see through its surface then this indicates it likely not being genuine as real diamonds have strong refractive qualities that obscure this test result.
The Dot Test works best when applied to loose black diamonds; however, a piece that’s already set can also be tested using this technique. Simply drop your diamond into hot water and observe its behavior; if it sinks to the bottom, it is likely a real stone; otherwise it could be fake; real diamonds possess high density while fake stones such as cubic zirconium and glass tend to brittle and break upon sudden exposure to heat.
The Heat Test
Although scratch tests on black diamonds cannot be performed, you can use another simple test to verify if they are real or not. Either loose or set in jewelry, exhaling onto it creates a fog on its surface; real diamonds will quickly clear due to natural heat and moisture properties while fake ones will take longer for this fogging to pass away.
Use a diamond tester to verify whether the gemstone you purchased is genuine; genuine diamonds typically score 10 on Mohs scale, while fake ones might only receive 6.
One way to recognize an authentic black diamond is to examine its color under blacklight. A genuine stone will glow blue; while imitations may show yellow-white-red-or green hues. If in doubt about an item’s authenticity, consult a certified gemologist for an appraisal and blacklight test.
Jeweler’s loupes can also assist in determining whether a diamond is authentic. Real diamonds will contain inclusions, or imperfections, which give it its sparkle and brilliance; any diamond that appears flawless or near-flawless could possibly be fake, as all real diamonds contain inclusions that give their spark.
As well as using its refraction of light to determine its authenticity, magnifying glasses can also help identify natural or treated black diamonds. Real black diamonds will feature crystal structures visible under magnification; any black gem that looks blotchy or grayish is likely synthetic.
To conduct a heat test on a black diamond, you will require laboratory equipment like safety glasses, beakers and Bunsen burners. Grab the diamond using pliers while heating it over a flame for thirty to sixty seconds, before plunging it into cold water in a glass – real diamonds should remain undamaged by such sudden temperature shifts; fake stones made of weaker materials such as glass and zirconium will likely shatter or crack during such sudden changes in temperature.