The AA. illustrate the results of the analyses, by fluorescence X-ray and refractive index, of obsidians both from source areas of central and eastern Anatolia and from late-chalcolithic levels of Arslantepe (Malatya, Turkey). These levels are characterized by a large prevalence of eastern obsidians from many source areas; therefore their evidence fit in the pattern of diffusion outlined for the Chalcolithic by previous authors.

S With the aim of establishing the provenance of pumices along the North Coast of Cyprus, from Morphou to Kormakiti, chemical analysis, refractive indices determinations and mineralogical examination have been performed. On the basis of the experimental data the pumices can be distinguished into two groups. For the first one a provenance from Santorini can be established, for the second Yali, Kos and Milos can be taken into consideration as source localities.