The most important characteristics of porphyry are
    - high tensile compression strength
- excellent resistance to chemical agents
- significant sliding and rolling friction
The most popular 
Italian porphyry  is certainly the kind found in 
Trentino . Its structural characteristics, fundamentally important in the external flooring industry (resistance to wear, durability, frost resistance), combined with the variety of colours and natural roughness make this stone the queen of stone materials.
Porphyry is thereforeused for 
any kind of flooring, from simple pavements to roads and squares  that are subject to intense and continuous heavy traffic