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How To Tell If Your Diamonds Are The Real Deal

15 Jun 2017

Whether you are in the market for a new diamond, or want to figure out whether or not the diamonds you own are real, you need to know a few ways to tell. Here are a few tips for determining whether or not certain diamonds are real or fake.


Round Diamonds vs. Cubic Zirconia


The best thing to do is to take your gemstone to a reputable jeweller who will be able to verify its authenticity. But, if you want to try out your own detective skills, there are a few things you can do:


Try the “read-through” effectIf you purchase wholesale loose diamonds in Sydney, you can turn the loose stone upside down on a piece of printed paper. If you can’t read the text through the diamond, it may not be real.


The fog test – Diamonds are great heat conductors, so once you breathe on a real stone, the fog will disappear immediately. If it is fake, the top of the stone will be foggy for a few seconds.


Thermal conductivity probe – Using thermal heat can help separate real diamonds from fakes by detecting the rate at which the stone disperse heat. 


Magnification – If you have a microscope or a jeweller’s loupe, there are a range of observations you can make to determine if you have a real or fake diamond. Use magnification to look at the stone through the star of bezel facet on the crown. If the diamond shows doubling and looks like there are two facet lines, it is probably a moissanite stone. If there is just one facet line, and the stone has passed your heat test, it may be the real deal.


A Few Things to Be Aware Of


Other materials, like Cubic Zirconia, are singly refractive, too. However, you can use the magnification test and take a look at the girdle, or the narrow edge that runs around the circumference of the stone. Real diamonds will show a grainy, frosted look or have tiny facets around the girdle, but a Cubic Zirconia stone will be totally smooth.


Another thing to look for when using the magnification method is whether the stone has natural inclusions or not. Real stones will have some type of inclusions that occur naturally during the growth process. However, Cubic Zirconia and other man-made stones are produced in a factory environment and do not have any inclusions.


Questions to Ask a Jeweller


If you are shopping for diamond jewellery for a special occasion, such as an engagement ring, there are a few questions you can ask the jeweller to confirm that the stone you are buying is real. These include:


Is the diamond laser inscribed with a unique mark or identifying number on the girdle?

Does the stone come with a diamond report or certificate from a reputable diamond laboratory?

Ask the jeweller to point the inclusions out to you. Most real stones will have some visible inclusions when places under magnification.


Most importantly, work with a jeweller or diamond wholesaler that you trust and that you know has your best interests in mind.