The tiles in the "venetian way", of 25x25,2.7 cm in thickness consist of two layers. The first layer is about 1 cm thick and is made of portland cement, whashed and powered marbel crit, marblw powder and coloured oxides; the second layer is a strong concrete with select inert matters and it is about 1.7 cm thick. The tile is delivered in its natural state to polish afterwards.