Calacatta is prized for its clean white background and thick veins of grey and gold. That white is exactly what makes damage obvious. A lemon wedge leaves a dull ring you can see from across the room, and a splash of red wine or turmeric can tint the stone before anyone notices.
Like every true marble, Calacatta is calcium carbonate. Acids react with it and dissolve the surface, which is called etching. Sealers slow stains but cannot stop that reaction.

