GGTL Laboratories Liechtenstein Opens Belgium Lab for Fancy Color Diamond Testing


ICA News

GGTL Laboratories Liechtenstein is proud to announce that on Monday May 2nd, 2022, we are opening our new diamond testing laboratory in Antwerp, Belgium – the diamond capital of the world. With this addition to our headquarters in Liechtenstein we can offer an easier, faster, and more cost-effective option for the markets outside of Switzerland and Liechtenstein to get access to our diamond testing services.

Being specialized in fancy color diamonds, we will supply the market crucial diamond testing services in the easily accessible hub at the Diamantclub van Antwerpen (DCVA).

In a time with colored melee diamonds being more and more polluted by treated and particularly synthetic diamonds, the screening of such goods has become of utmost importance. GGTL Laboratories Liechtenstein – founded in 1996 and directed by Dr. Thomas Hainschwang – is one of the very few laboratories to offer full testing for colored melee diamonds in all colors, sizes and shapes. We will emphasize our leading market position in the testing of such colored melee diamonds with the new GGTL Belgium laboratory being especially well equipped to tackle large quantities of colored melee diamonds.

The fully equipped GGTL Belgium laboratory will be offering a range of services for diamonds, including the following analysis reports  (for the time being no grading reports):

  • Authenticity and treatment reports for colored melee diamonds (in all colors, shapes and sizes).
  • Authenticity and treatment reports for colored diamonds (single stones).
  • Authenticity and treatment reports for highly complex colored diamonds with radiation-related colors (yellow-green, green, bluish green to greenish blue) – so-called “GR1 Reports”.
  • Authenticity and treatment reports for colorless to near-colorless diamonds (single stones).

For any questions contact us at


Contact details:

GGTL Laboratories Belgium
Pelikaanstraat 62 – Office 610
2018 Antwerp, Belgium
Ph: +323 290 75 54 (from May 2nd)