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Certifying of diamonds

Each diamond sold by serious trader has to be supplied with a certificate issued by international gemological laboratory. Certificate guarantees a quality and an authenticity of your diamond. There shall be following necessary data:

  • Color
  • Weight
  • Clearness
  • Type and Quality of Cut
  • Name and Address of Laboratory
  • Number and Date of Issue


If you decide to check the quality by yourself, there are two options:

  • Assessment based on your own experiences. Firstly you need to have a lot of experiences with diamond assessment, special machines and tools and, of course, a thousand of stones you assessed and which were assessed by anyone else who is a specialist as well. This method is practically unusable for common investor.

  • Diamond tester. Second option is using a diamond tester, very easy and reliable way how to find it out. It works on the basis of heat conductivity. Diamond has got a very special value of the heat conductivity. These testers cost around 7000 CZK and more, but you cannot verify a color, a clearness or a quality of cut with the tester, and these features have significant influence on its price.

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From the comfort of your home, you can be in regular contact with us. Online webinars where you can find out more information about precious metals, cooperation options or answer your questions.

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