1. Remove the pestle and mortar from the bowl.
  2. Pour water into the bowl and stir to combine.
  3. Add the marble and stir to combine.
  4. Pour the mixture into a clean mortar and pestle bowl and use your hands to mix it together until all of the marble is coated with the water mixture.
  5. Place the bowl in a warm place for about an hour, or until all of the marble is wetted down and has turned into a smooth paste.