Even if some major elements like P and Mn sign ores such as iron ore of Lorraine or the ores of the Pyrenees, the major elements are not enough to trace the chemical signature of an ore, the use of the traces elements. These archaeological samples being heterogeneous a total analysis of the sample is essential. Moreover in order to distinguishing the most areas possible, a maximum of elements must be analyzed (Sc, Co, Ni, Rb, Cs, Ba, Ce, Sm, Eu, Yb, Hf, Th, U, Co, Ni).