Sapphires from Sri Lanka - Impressions of a visit to the “island of gemstones" | INHORGENTA 2026

Speaker: Dr. Tom Stephan, Managing Director, DGemG, Germany Dr. Tom Stephan studied geosciences at Johannes Gutenberg University in Mainz. Alongside his studies, he has worked since 2014 as a research associate and seminar facilitator for the German Gemmological Association in Idar-Oberstein and is now director. Since 2016 and as part of his doctorate (completed in 2020), he has also dealt with color examinations and calculations of gemstones colored by Cr3+ and/or V3+ such as rubies and emeralds. Tom Stephan regularly publishes articles in various national and international gemmological journals and he presents the results of his research at gemmological conferences such as the International Gemmological Conference (IGC) and the European Gemmological Symposium (EGS).