Natural because we employ the same forces used by nature itself (pressure and fire), following construction processes which reproduce its features and characteristics.
Ecocompatible because sands, clays and other minerals are quarried without damaging the environment.
--- with very high performance because clays, sands and materials used are extremely pure.
--- the compacting pressure is very high (480 kg/cm2).
--- the firing heat is much higher than the one of a volcano (1300°C and more).
