Accessory Materials

Small Marble Cubes: white marble cubes to be used as completion and ornament of porphyry floorings must come from the mines of Carrara, Massa or Lasa. The employment of other particularly tender materials is not acceptable, and neither the use of those materials which, compared to porphyry, have an excessively smaller resistance to atmospheric agents and to traffic. Other stones (locally extracted or worked) can be used if in conformity with a sufficient resistance to usury and to sliding friction.