... blue, purple....Stone Choose G603,G654,G682,G684,Black basalt,Porphyry,Limestone,Slate & Quartize, Sandstone,Lave stone,etc FinishingHoned, ... no dust, non-toxic. EdgeBevel, SlantFinished Productskerbstones, Paving stone, Cubes, Bridge kerbs Features low water absorption, ideal building ... No light pollution, no radiation, high quality natural stone material. Usage square,floor,park,decoration,etc. ...