... guaranteed. 4)Competitive price. 5)Packaging nicely and neatly black slate slab,flooring slate,wall slate,1)european standard B.S.EN12326 2)no fading ... absorption 0.2% 4)high quality control.5)color rusty,black,green,yellowslate, is natural material,color is stable,10,000m2 ... color,it can make tile,mushroom,culture stone,billards etc... black slate slab