Marble is made of limestone and when it comes in contact with the acid will ruin. There needs to be a Crystallizer to clean a marble with acid stains.

Common supermarket detergents can cause stains and spots on the porcelain tile. To clean these surfaces you need something more suitable.

Marble crystallization, traditional polishing, sanding, which one to choose?

5 effective ways to clean, remove stains, dirt or opaque marble polishing

Cleaning and restoration of a Carrara marble statue depicting the Madonna with Christ in a small church in the town of Prato; the statue made many years ago in a weatherproof yard, had visible biological incrostrazioni