... G684,Black basalt,Porphyry,Limestone,Slate & Quartize, Sandstone,Lave stone,etc FinishingHoned, Flamed, Sandblasted, Rough hammered, Bush hammered, ... , no dust, non-toxic. EdgeBevel, SlantFinished Productskerbstones, Paving stone, Cubes, Bridge kerbs Features low water absorption, ideal building ... tons per 20GP container or according to customer need Polishing degree usually above 80 degree and can be ...