... Black basalt,Porphyry,Limestone,Slate & Quartize, Sandstone,Lave stone,etc FinishingHoned, Flamed, Sandblasted, Rough hammered, Bush ... no dust, non-toxic. EdgeBevel, SlantFinished Productskerbstones, Paving stone, Cubes, Bridge kerbs Features low water absorption, ideal ... slabs, stairs, hard with excellent weather durability.No light pollution, no radiation, high quality natural stone material. Usage ...