If you spilled anything oil based like a vinaigrette.
Acetone on marble floors.
Be sure to wipe the area with a clean damp cloth afterward.
Found in most nail polish removers acetone has similar cleaning properties to hydrogen peroxide but with the added bonus that it doesn t discolor dark marble.
If you are cleaning marble floors then try using a duster or broom for this.
If you discover a stain on your black marble clean it with a cotton ball dipped in acetone.
Organic stains are typically noticed once the item that makes the stain.
Nail polish remover is usually acetone which does not damage or stain marble and some other products which can damage marble.
Use a cotton swap dipped in acetone to gently work out stains and wash the area with plenty of plain water afterward.
Light brown to yellow in color.
Since darker marble is denser than its lighter counterpart it tends to be more stain resistant too.
Examples include milk peanut butter or hand lotions.
They can be removed with a marble poultice made with acetone or mineral spirits.
So i m assuming that the nail polish remover etched the marble unless there is some type of nail polish remover product that contains a colored dye that could stain.