"Vallangis" is a naming which guarantees the quality and certifies the origin of our stone.

Characteristics :
Sound Velocity.... 4160 m/s
Apparent Density .... 2160 kg/m3
Real Density... 2640 kg/m3
Surface Hardness.... 1.58 mm
Porosity.... 19.2 %
Anchoring resistance (in 3 cm thick).... 875N

ABRASION RESISTANCE TEST :
Abrasion resistance....36.1 mm
COMPRESSIVE TEST :
Compressive strength....33.2 Mpa
FREEZE TEST :
Freeze test at 240 cycles : no alteration