Certificado de Autenticidad de Joyeria

The marketing jeweled has behind him a very complex process of research , study and treatment of gemstones which responds to the name of gemology .

What is gemology?

The gemology is a science that studies and identifies the various gemstones and minerals , the proper treatment for each, the obligatory differentiation between real and artificial as well as this influences their sale and collectibles .

Having knowledge about gemology is a very necessary complement for all people who are professionally engaged in working with jewelry and precious stones , especially in recent times where the advances in the counterfeiting of precious stones and jewelry thanks to the use of chemical materials that they are increasingly difficult to distinguish. This not only means that there are jewelry counterfeits from chemical materials that get a look quite similar to the original, but also that jewelry with small precious stones is used that, thanks to these chemical processes , become largeror in other colors than the original, for example.

Precious stones

What tools do experts use to detect artificial alterations in precious stones?

In the same way that advances are made in techniques to falsify and artificially alter gemstones for their subsequent commercialization , so too are instruments or tools to identify these alterations and differentiate between authentic and counterfeit gemstones .

These are some of the tools used to investigate precious stones and jewelry :

  1. The binocular loupe has been a very useful tool, because with it you can see precious stones in microscopic size with a high quality lighting system, which greatly facilitates the differentiation between synthetic and real gems.
  2. A high-powered laser with techniques such as SIMS and LIBS , which are basically slightly destructive techniques but that help discover when the color of a gem is natural or has been genetically engineered to look like a color that it doesn’t actually have.
  3. Infrared rays combined with cathodoluminescence images to be able to distinguish above all natural diamonds from synthetic ones .


If a person has a jewel or precious stone that they would like to analyze, to know if it is true or not, but also to be able to put a price that corresponds to reality, they must go to an expert in gemology , also called a gemologist , to that it can make the necessary analysis and its corresponding certificate of authenticity if it does.

Let’s talk about what data a certificate of authenticity must have :

  • Gemstone or gem general description : weight, appearance, measurements, color, purity or UV fluorescence (intensity of fluorescence in the gemstone).
  • Quality photography of the jewel to be able to compare it with the real jewel or precious stone.
  • A number or code of the certificate , since a jewel has a certificate of authenticity not only means that the person who owns it has a guarantee that it is authentic, it also means that that jewel is registered in a general database so that Experts can then use statistics and data on counterfeiting and various developments.
  • The evolution on the jewel or precious stone that the gemologists involved have studied, explaining for example whether they have suffered any subsequent alteration or not.
  • The signature and professional data of the gemologist who has made the certificate (his or her collegiate number or the data from the laboratory where the research was carried out).
  • The date on which the document was made, since if a certificate of authenticity is made and concluded and many years have passed, the gemstone or jewel will probably need a new analysis in which to certify that the characteristics remain the same.


A certificate of authenticity for jewelry is absolutely essential. Why? Because, in the first place, if a person wants to sell a jewel or a precious stone , surely they will not be able to find any interested person if they do not have a certificate of authenticity that guarantees that the jewel is worth what it is worth and is not a counterfeit .

On the other hand, for a person who wishes to acquire a jewel or precious stone , the only real proof that what he has bought is authentic, is that with the purchase they provide him with the certificate of authenticity . In addition, in the event that a person is a buyer of a jewel, and wants to take out insurance in the event that something happens to the jewel or precious stone, no insurance will cover anything if they are not presented with a certificate of authenticity of the jewel .

The appraisal after the certificate of authenticity

Once a professional gemologist has carried out the study and investigation of a particular gem or gem , and has written it down in the certificate of authenticity , the next step is to assess according to the criteria and characteristics described in the certificate of authenticity .

Normally, the person who does the necessary analysis to carry out the certificate of authenticity , and who does the appraisal, is the same. Once you have studied the specific piece of jewelry , you should be aware of market prices and set the PVP (retail price), thus signing the official document where your analysis appears, its certificate of authenticity and its price .

In almost all cases the certificate of authenticity and the fixing of the price is not made from the gemstone itself but from the piece of jewelry , that is, with the precious stones already set in the metal setting and considered as a complete piece. However, there is also the possibility of making a certificate of authenticity of a precious stone that is not part of a jewel.

As in the whole market for products that can be counterfeited, a person should always go to experts who have a good reputation in order to have a certificate of authenticity that is credible and therefore useful.