Usege: Lava stone is widely used in cooking ,  BBQ , construction,irrigation works, filter material, garden scene, soilless culture etc .   Properties: 1.Explosion protection. 2.Weight is very light. 3.Perfect intensity 4.Heat preservation and thermal insulation. 5.Has lots of holes 6.Corrosion and acid-base resisting 7.Non-pollution and no radioactivity, environment protection 8.Different specifications.       Chemical composition  

SiO2	CaO	MgO	Fe2O3	Al2O3	K2O	FeO	Na2O	TiO2
53.82%	8.36%	2.46%	9.08%	16.89%	2.3%	1.12%	2.55%	0.06%