Cotto is a natural material, like wood or stone, and its full beauty and richness are displayed through an infinite variety of colour nuances and minor surface flaws, which differ from one tile to another. While the clay is still wet, before the subsequent steps of drying and firing, the surface can be left as it is, or it can be deliberately structured. The fired tiles emerging from the kiln will inevitably differ one from another, either slightly, as in the case of raw cotto, or more noticeably as in the case of structured cotto. In any event, a cotto floor will always display slight variations in shade and colour, softly blended and full of atmosphere. It is no accident that materials like these are sought after by people wanting to enjoy the authentic feel of natural terracotta, combined with the precision and practical advantages of an industrial product.