Instrumental neutron activation analysis has been applied for the determination of 20 minor and trace elements (As, Ce, Co, Cr, Cs, Eu, Fe, Hf, La, Lu, Na, Rb, Sb, Sc, Sm, Ta, Tb, Th, Yb and Zn) in two groups of potsherds which had been excavated at two different sites of Greece, the islands of Thasos (Group A) and Delos (Group B). A good agreement for all the elements examined between the pottery specimens of Groups A and B was found. The matching in chemical composition between the stylistically related potteries of Group A (Thasos) and Group B (Delos) provides strong support for the archaeologist's hypothesis that the two groups of potsherds belong to the same major group of “melian” pottery.