Gemeinsame Veranstaltung der Österreichischen Mineralogischen Gesellschaft, der Österreichischen Gemmologischen Gesellschaft und der Freunde des NHM Wien
Are the Balkans a cradle of gemmology? Neolithic and Chalcolithic artifacts (7 - 5th mill. BC) from Bulgaria reveal technology and knowledge of a variety of mineral and gem species (carnelian; nephrite; malachite; serpentinite; jadeite; turquoise; graphite; jet) including the oldest gold treasure of the world.