The granites are  the  most  abundant  stone  of  the  terrestrial  crust. They are  formed essentially by quartz and feldspato,  being  this last one basically alkaline.  Besides this they also have  it  in his formation others, as:  the biotite, moscovite,  piroxena, metallic minerals, turmalina, apatite, etc. 
      The granites  have  great  use  in  Arquitectur  and  Pavementing. The  Casa dos  Diamantes divides  the  granites  in  5  different classes. For which the CD  has the ideal solution, always noticing the equipment that use it.
      In more than  twenty  years  the  CD  congregated  knowledge  and  experience particularly in this sector.