... outdoor paving, in size 30x60x3cm, 40x60x3cm, 60x60x3cm.4. G684 black basalt can be made into tiles, flooring, stairs, window-sills ... , countertops, pavers, steps, kerbs, cubes, small slabs etc. Big slabs are not available. 5. Our advantage ... . Our company is very experienced and professional on supplying various black basalt or granite. 5)- We have CE certificates. 6)- ...