1. Marbles are not necessarily “Soft” Many people say that marble is a “soft stone,” but really what they mean is that it has a tendency to react to acids. Actually, the minerals in marble are not the softest on the Mohs scale; it is a common misconception that stone softness has a correlation to chemical … ∞
First, let’s distinguish the difference between stone restoration and stone maintenance. The Marble Institute of America (now the Natural Stone Institute) defines maintenance as “Cleaning done on a scheduled basis: daily, weekly, etc. in order to remove dirt, dust and other contaminants that degrade the stone surface and reduce the stone’s polish. Scheduled maintenance … ∞