World Of Gems Conference 2017 Proceedings Book

Dr. Hanco Zwaan, FGA Hanco Zwaan joined the National Museum of Natural History Naturalis, Leiden, the Netherlands, in 1995, as curator of minerals and gems and became head of the Nether- lands Gemmological Laboratory soon thereafter. Issuing gem and pearl identification re- ports, diamond grading reports, and teaching gemmology, is part of his daily work, as well as studying processes in the Earth’s crust that have lead to the formation of gem- stones. Dr. Zwaan has a PhD from Free University of Amsterdam on Geology, specializing on the formation of emeralds, with the publication ‘the Gemmology, geology and origin of the Sandawana emerald deposits, Zimbabwe.’ Apart from this focus on emeralds, he also published articles on a variety of other gem- mological and mineralogical topics. For example, he co-authored the Edward Gübelin Most Valuable Article of theYear Award 2008 – first prize winning article ‘Copper-bearing (Paraíba-type) Tourmaline from Mozambique’ that appeared in Gems & Gemology and, in the same journal, wrote on the origin of Montana sapphires in 2015. Hanco Zwaan is currently president of the World Jewellery Confederation (CIBJO) gemmological commission, dealing with nomenclature issues and laboratory best practices. Nederlands Edelsteen Laboratorium (NEL) - Netherlands Gemmological Laboratory Naturalis Biodiversity Center - Research and Education division - Taxonomy and Systematics Group, Deep and Early Earth Team J.H. Oortweg 19, 2333 CH Leiden, The Netherlands Hanco.zwaan@naturalis.nl SPEAKERS WORLD OF GEMS CONFERENCE V - 60 - SEPTEMBER 2017