Etched Rings on Black Marble Table
What substances are responsible for the mess?
Lots of household products can damage the marble. You should especially look out for acidic spills from things such as lemon and vinegar, fruit juice, body care products and strong cleaning products.
You should try to keep from getting them in the first place, by sealing marble, using cup pads/coasters or table mats from your local hardware store.
Use pH 7 balanced stone cleaners only.