PETRONELA SPIRIDON, IRINA CRINA ANCA SANDU, LILIANA NICA, VIORICA VASILACHE, ION SANDU ARCHAEOMETRIC AND CHEMOMETRIC STUDIES INVOLVED IN THE AUTHENTICATION OF OLD HERITAGE ARTEFACTS I. CONTRIBUTIONS OF THE IASI SCHOOL OF CONSERVATION SCIENCE The paper presents the results obtained in the study of new archaeometric and chemometric characteristics involved in the authentication of old artefacts made of metal, ceramics and polychrome wood, by the Iasi school of Conservation Science of cultural heritage goods. Most of the metal and ceramic artefacts considered for this study originate from archaeological sites from the region of Moldavia and Dobrudja, and those of polychrome wood from state or private collections and monastic establishments. The data obtained, using modern experimental methods and techniques, has allowed us to set the fundaments of phenomenological aspects related to the conception/execution, acquired patina, evolutive effects of deterioration and degradation, historical contexts, etc. These discoveries have been acknowledged as interdisciplinary effects, as evidenced by the citations listed in scientometric databases.