The Dorotheum offers you one of the best-equipped state-of-the-art gemmological laboratories. With our highly qualified specialists and technical know-how we guarantee quality control according to current international standards (EN ISO/IEC 1725).

Why Certificates Are Needed
Would you like to know the current value of your piece of jewellery or watch? Or would you like to find out whether the stones in your piece of jewellery are genuine? Would you like to buy, sell, or consign items? Then a certificate would be an important aid in making your decision.

Certificates are also be necessary as evidence in matters of insurance and in court or customs procedures, as a security for loans, when making donations, or in matters of an inheritance.

We Are Available to You with Our Expertise and Competence
Collaboration with international gemmological laboratories as well as with international and national diamond experts and gemmologists, the Federal Gemmological Institute at the Museum of Natural History, and the Institute of Mineralogy and Crystallography at the University of Vienna enables us to produce analyses of superior quality.