Dr. Karl Schmetzer

Taubenweg 16
D-85238 Petershausen
Tel. +49 8137 7770, Fax +49 8137 5480
e-mail: schmetzerkarl@hotmail.com

Dr. Schmetzer is an independent gemmology researcher and consultant based in Petershausen, Germany, near Munich. He specializes in the mineralogy of gemstones, characterization of natural and synthetic gem materials, description of new gemstones and new gem localities, causes of colour and colour changes produced through treatment, and differentiation of natural gemstones from their synthetic counterparts.
As prolific author, Dr. Schmetzer has produced nearly 400 papers and articles, mostly in English and German, which have been published in the major gemmological journals, including Gems & Gemology, Journal of Gemmology, Neues Jahrbuch für Mineralogie Monatshefte.
He is a member of the editorial board of the American, Australina, and French gemmological journals. He has been invited to lecture at special gemmological conferences in the United States, China, Brazil, Austria and Switzerland, and he is the German delegate to the International Gemmological Conference.

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