Prof. Dr. Emmanuel Fritsch

Dr. Emmanuel Fritsch, is a professor of physics at the university of Nantes in western France. He holds a geological engineering degree from the ENSG, Nancy, Eastern France, and a Ph.D. from the Sorbonne (university Paris VII) in Paris. He worked for nearly ten years at the Gemological Institute of America (GIA) in the USA, where he became a Graduate Gemologist (GG), and was promoted manager of GIA Research from 1992 to 1995. His research is currently conducted at the Institut des Matériaux Jean Rouxel (IMN-CNRS) in Nantes, western France. Dr. Fritsch interests range wide, from laboratory techniques applied to gemology, to color and luminescence in gems (especially diamonds), geographical origin, treated and synthetic gems, opals and pearls. His self-assigned mission is to make gemology more scientific. He has authored over 350 articles, eighteen book chapters, a book on the gems from Mogok in 2018, and given over 325 conferences all over the world, both scientific and popular. He is responsible for the DUG (Diplôme d’Université de Gemmologie) diploma. He has received many awards, including the 2013 Bonnano Award for Excellence in Gemology, and is one of the three honorary fellows of the Gemmological Association of Great Britain.

Dissolved dislocations as empty inclusions in gems


Dissolved dislocations are elongated, tapered inclusions, often difficult to recognize as such, because they are most of the time empty and cover a wide variety of aspects (e.g. kinked, curved, loops, networks). They are caused by surprisingly fast dissolution along crystallographic defects called dislocations. They have been documented in a wide variety of gems, from diamond to danburite.

Impressions from the first EGS 2007 in Idar-Oberstein

Register for the European Gemmological Symposium
on May 24 – 26, 2019 in Idar-Oberstein.

During the two days’ conference, you will enjoy numerous internationally recognized and distinguished speakers, as well as a broad spectrum of subjects including diamonds, coloured stone, pearls and jewellery.

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