The following speakers have confirmed their attendance

For more information, click on the speaker's name.



Dr. Ahmadjan Abduriyim, Japan:
Tokyo Gem Science LLC, Saitama, Japan
The Gemmological Characteristics of Japanese Freshwater Cultured Pearls from the Lake Kasumigaura


Dr. Gaetano Cavalieri, Italy:
President of CIBJO – The World Jewellery Confederation
Opening Ceremony Speaker


Dr. Robert Chodelka, Switzerland:
Ziemer Swiss Diamond Art AG, Port, Switzerland
Ziemer Swiss Grown Diamonds - A Tremendous Opportunity for Everyone Involved in the Diamond Industry


Branko Deljanin, B.Sc., Canada:
CGL–GRS Swiss Canadian Gemlab, Vancouver, Canada
Origin of Pink Diamonds: Argyle and Non-Argyle Natural, Treated and Lab-Grown


Prof. Dr. Emmanuel Fritsch, France:
Institut des Matériaux Jean Rouxel (IMN) & University of Nantes, France
Dissolved Dislocations in Gems: an Overview


Frank Frühauf, Germany:
Lord Mayor of Idar-Oberstein and Patron of 7th European Gemmological Symposium 2019
Opening Ceremony Speaker


Dr. Tobias Häger, Germany:
Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany
Colombian Emeralds - an Update


Hans-Jürgen Henn, Germany:
Henn GmbH, Idar-Oberstein, Germany
A Gem of a Life (Keynote Speech)


Dr. Michael Krzemnicki, Switzerland:
Swiss Gemmological Institute SSEF, Basel, Switzerland
Red Ruby or Pink Sapphire, That’s the Question - Where is the Boundary Between Colour Varieties of Gems?


Dr. Thomas Lind, Germany:
President of the German Gemmological Association, Chairman of the Board of the German Foundation for Gemstone Research
Opening Ceremony Speaker


Dr. Claudio Milisenda, Germany:
DSEF German Gem Lab, Idar-Oberstein, Germany
Spectroscopical Research on Gemstone Structure, Colour and Modification: a DGemG/DSEF Perspective


Dr. Daniel Nyfeler, Switzerland:
Gübelin Gem Lab, Lucerne, Switzerland
Provenance Proof: Technologies for Tracing and Tracking Gemstones Along the Entire Value Chain


Dr. Federico Pezzotta, Italy:
Natural History Museum, Milano, Italy
Madagascar Rubellite: Deposits and Recent Production


Kenneth Scarratt, Bahrain:
Bahrain Institute for Pearls & Gemstones (Danat), Manama, Kingdom of Bahrain
A Recent Expedition to Acquire and Characterize Natural Pearls from Australian Pinctada Maxima


Prof. Dr. Andy Shen, China:
Gemmological Institute, China University of Geosciences, Wuhan, China
An Updated Study on the Role of H and Fe in Ametrine and Their Relationships with Colour


Dr. James Shigley, USA:
Gemological Institute of America, Carlsbad, California, USA
Identifying Synthetic Diamonds: Past Progress and Current Challenges


Tom Stephan, M.Sc., Germany:
German Gemmological Association (DGemG), Idar-Oberstein, Germany
The Role of V3+ in Gemstones Mainly Coloured by Cr3+, Shown by Spectral Fitting at the Example of Emerald and Ruby

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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