Recently, several archaeometrical projects were started on the prehistoric collection of the Hungarian National Museum. Among
the analytical methods applied, non-destructive prompt gamma activation analysis (PGAA) has a special importance. Based on
major-and trace components, characterization of stone tools and their raw materials were performed. Until now, 160 pieces
from Carpathian Basin and from the surrounding area (Romania, Croatia, Ukraine, Poland and the Mediterranean region) have
been analyzed, including both archaeological and geological pieces. Obsidian and Szeletian felsitic porphyry objects adequately
separable with PGAA. Identification of high silica silex categories, however, is much more difficult.