Marble stone flooring with 12-15 mm thick marble stone, as per sample of marble approved by Engineer-in-charge, over 20 mm (average) thick base of cement mortar 1:4 (1 cement : 4 coarse sand) laid and jointed with grey cement slurry, including rubbing and polishing complete with : Black Marble tiles of Kishangarn, Zebra, Makrana , Dhabi or Doongri Zebra thickness12mm to 15mm Slabs sizes above 0.50 sqm