We describe the results of electromigration desalination of two soluble salt-contaminated Galician granites. The efficacy of elecromigration, which had not been previously applied to granite, was assessed for two types of contaminated with a 20% NaCl solution and sewater. Desalination effectivenes was evaluated as follows: (1) analysis of anode and cathode ion content during testing; (2) analysis of ions at different distances from the elecrodes after testing; (3) pH assessment of the stone surfaces; and (4) evaluation of colour changes. Results were very satisfactory; by the end of testing, chloride was educed by almost 100% in both the NaCl and seawater contaminated samples. Sulfate reduction was also significant, despite this ion's lower mobility. The granite pH values remained close to neutral and colour changes were minimal. The difference in effectiveness of the process fot the two types of stone was associated with their dissimilar pore structure.