The Secret of the Ancients for Sparkling Marble: The Trick That Replaces White Vinegar Without Damaging the Stone

White vinegar, although popular for cleaning, is harmful to marble because it attacks calcium carbonate, dulling and eroding the stone. The ancients used Marseille soap diluted in warm water, applied with a soft cloth, to clean marble without damaging it. Liquid black soap and blanc de Meudon are also effective alternatives. This method preserves the shine and avoids costly restorations.