... Basalt Floor Tile Basalt has two color tones as Grey and Dark. And basalt dark is more widely used bothin interior and ... exterior use,can be made into wall stone cladding,blindstone,tiles,flooring,stairs ... Paving,Mosaics etc.Usage:Black Basalt Can be made into wall stone cladding,blindstone,tiles,flooring,stairs,window-sills,countertops,pavers ...