Migmatic granite of the batolith of Gredos. Good mining. Any kind of use.
General Caracteristics:
- Origin: Piornal 
- Province: Cáceres
- Colour: Grey
Petrographic description: Mega crystals with biotite granite
Grain size:Thin
Opened porosity ( %): 0,8
Apparent density ( Kg/m3): 2740
Resistance to the graze ( mm): 17
Resistance to the compression ( MPa): 133
Resistance to the concentrated load deflection (MPa): 12,3
Elastic Module ( MPa): 39114
Microhardness knoop ( Mpa): 1910
Resistance to shock (cm): 34
Water absorption for capillarity (g/m” · s0,5): 0,432
Resistance to ice ( % variation flexion after cycles ): 0
Resistance to the crystallization of salts (Mass variation): 0
Water Absorption under atmospheric pressure ( %): 0,2
Break charge (N): 2450