The metal surface used as support for impressing marks and signs, quite similar to the rocks signed by prehistoric forefathers in the past. In this way the matter keeps a real linguistic code through human intervention. Decorations were represented in a stylised and conventional way also during Neolithic age, so they were considered as simply geometrical motif.So triangle symbolized life, lozenge symbolized seeds in a field, pillar (line) was life-force power and the circle was sun. Matter was scratched and scraped in the past, but now it will be treated by the craftsmanship with an alternation of polishing and matte on different levels. This process will create geometrical signs of instinctive and contemporary interpretation.