This lava stone has many natureal holes(big, middleand tiny holes) in, which has many better special functions than any other stone products, besides the general features same as the common stone materials it also has many other special features such as sound absorbing and insulation, heat absorbing and preservation, water absorbing and slide proof, Acid & alkali proof."Breathing function"etc., and it is called "Functional stone materials" by the specialists in the stone materials line. This nature stone material meets the new requirments of people to pursue the nature, primitive simplicity and green environment.It can be used widely in the decoration of outer walls for every kind of constructions, paving for municipal roads, square, living districts;it is especially the first choice material for all buildings of ancient imitation.European style and Garden building.