... 3)Strong Package,Cheap Price 4)Fast Delivery Basalt Floor Tile Basalt has two color tones as Grey and Dark. And ... used bothin interior and exterior use,can be made into wall stone cladding,blindstone,tiles,flooring,stairs,window-sills,countertops, pavers ... Paving,Mosaics etc.Usage:Black Basalt Can be made into wall stone cladding,blindstone,tiles,flooring,stairs,window-sills,countertops,pavers ...