Recrystallization
Fact: Marble and stone must breathe (transpire). If the pores are blocked, moisture from the slab (condensation, etc) will be trapped and the stone will begin to break down.
Fact: The recrystallization process places an impermeable coating of flourosilicates on the stone, completely blocking its pores.
Fact: Acid will destroy marble and stone.
Fact: All crystallization fluids contain acids.
The above facts are clear and incontrovertable evidence. What is even more startling are the dozens of marble floors and walls we have seen that have been destroyed by this process.
Along with other responsible stone restoration firms in the industry, I urge anyone --- even thinking about allowing a "crystallization" process to be used --- to test the proposed products on a marble sample and judge the results for yourself. You will find the rapid deterioration of the marble frightening.