Porcelain stoneware. CONCERT is made with porcelain stoneware of the best quality, to guarantee the highest technical standards, such as resistance to breakage, scratches, absorption, stains and acids, allowing at the same time cleaning quick and easy from the surface. The richness of decorations and special pieces, accompanied of a double color (white and black) and of the double essence of matter (carrara and blue stone), makes CONCERT a collection Polyhedral suitable for many solutions.