Crystallization is a method of creating a gloss on calcium based floors (marble, limestone, and travertine). This is a process in which a steel wool pad is used in combination with a weighted floor machine and acid solution to bring a polish to stone floors. The steel wool generates heat through abrasion and the chemical reacts with the marble, producing a new compound on the surface of the stone. The surface of the stone has now been chemically altered and there is no way to reverse the process. Note that this new surface of the stone is not a coating but is now part of the stone itself. The only way to remove a crystallized layer is through mechanical action such as diamond honing with diamond discs or the SRDS’ (scratch removal discs). Chemical strippers commonly used to remove acrylics will not remove crystallization.
The resulting layer of calcium fluorosilicate formed on the surface of the stone is harder, glossier, and more stain resistant than the original stone surface. This is the principal behind crystallization.