Grey stones are characteristic of clear style , pure and simple texture , various shaoes and natural colour . Grey stones have the advantage of heat insulation , fireproof , non-poison , non-deformation and non-fading . They are light in weight , high in strength with corrosion resistance and antifreezing . Meanwhile , the man made grey stone have all sorts of features of natural stones , fully demonstrating original and natural beauty , bringing you simple , natural and elegant sense , letting you enjoy the charm of returning and tasting the nature . The products are widely used in surface decoration on the outside and inside walls of various styles of buildings , like villas , flats , restaurants , gardens , hotels , cultural amusement places and yards.