Dr. A. Peretti - www.gemresearch.ch - graduated from the Institute of Mineralogy and Petrography at the Swiss Federal Institute of Technology (SFIT) in Zurich (Switzerland) with a PhD on “Occurrence and Stabilities of Minerals”. He also holds an award from the University of Zurich (Switzerland) for his Master thesis focussed on “Tectonics and Metamorphism in the Alps” and is acknowledged by both the British and German Gemological Associations (FGA and FGG). From 1989 to 1992, he was director of the Gübelin Gemological Laboratory and in 1996 he founded GRS - an internationally active private gemological research company. The professional activities of Dr. A. Peretti have been certified by the European Federation of Geologists (Paris, France), and he was awarded the title "European Geologist" in 2000.

Dr. Peretti’s daily laboratory work (including expeditions to mines, visiting cutting and treating centers, and cooperating with Universities and research scientists) has enabled him to contribute articles on gemology and mineralogy to publications such as Gems and Gemology (USA), Journal of Gemology (GB), Neue Zürcher Zeitung (Switzerland), NZZ television (Switzerland) and Contributions to Mineralogy and Petrology. Currently, he is the director of GRS Gemresearch Swisslab LTD. (GRS), (Lucerne, Switzerland) and GRS (Thailand) Co. LTD, (Bangkok, Thailand).