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Thursday September 17, 2026 3:00pm - 4:00pm EDT
For many in the gem trade, luminescence is nothing more than the observation of the glow that gemstones exhibit under a UV lamp used in gemology, with limited use such as the distinction of natural and synthetic spinel. But fluorescence is a property of much more importance used in a wide array of applications. In the past three decades a large variety of luminescence-based gem-testing methods have been developed, from imaging to spectroscopy using all sorts of excitation sources. Today, luminescence-based testing is extensively used for diamond testing but also for a wide range of other gem species such as corundum, spinel, beryl and many others. This presentation offers an insight into the world of gemstone luminescence, with amazing images, surprising science, and convincing results.
Speakers
avatar for Thomas Hainschwang

Thomas Hainschwang

CEO, GGTL Laboratories
I am Director and co-founder of GGTL Laboratories (GGTL Laboratories Liechtenstein). I have founded Gemlab (Liechtenstein) in 1996 and have joined a very close collaboration with GemTechLab in Geneva in 2011, through which GGTL Laboratories emerged, with the three member labs in Liechtenstein... Read More →
Thursday September 17, 2026 3:00pm - 4:00pm EDT
Olympic A

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