THE MATERIAL
This is a volcanic rock mainly composed of very hard silica. It has high resistance to wear, abrasion and compression. It is not sensitive to acids and is hard to scratch and if opportunely treated is hard to stain. The length of the sheets is between 280 and 330 cm and the thicknesses used are 2 or 3 cm. The tolerance of the thickness is +/- 1.5mm if not calibrated.