Polished stone floors become dull when heavy foot traffic along with sediment erodes the crystals.The sediment and grit that lies on the stone surface is the main enemy of the stones crystals. The damage to the crystals occur when the pressure from the shoe forces the sediment to abrade or fracture the crystals. The only safe way to restore and sharpen the crystals is to polish them with diamond abrasives or polishing powders. The life span of crystals can be extended by administering a thorough dust mopping an extensive entrance matting is extremely important because it keeps exterior sediment from entering a building. at last i need to say it's remarkable..