This report contains preliminary results of neutron activation analysis of obsidian from the site of Beisamun, Israel. Six analyzed obsidians from the site unquestionably match an Anatolian source flow called Göllü Dag. Data for Göllü Dag and two other Anatolian sources are presented along with the artifact data. It is interesting that the Beisamun artifacts are more homogeneous than the source, suggesting procurement of cores within a restricted part of the flow.