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Are you Eduard Josef Gübelin, author of the books below?
Photoatlas of Inclusions in Gemstones Volume 1 by Eduard Josef Gübelin Photoatlas of Inclusions in Gemstones Volume 2 by Eduard Josef Gübelin Internal World of Gemstones by Eduard Josef Gübelin Inclusions as a means of gemstone identification by Eduard Josef Gübelin Photoatlas of Inclusions in Gemstones Volume 3 by Eduard Josef Gübelin The Color Treasury of Gemstones by Eduard Josef Gübelin Edelsteinkundliches Handbuch by Eduard Josef Gübelin Birmanie Le pays des pagodes by Eduard Josef Gübelin The Color Treasury of Gemstones by Eduard Josef Gübelin Edelsteine by Eduard Josef Gübelin


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