You can create a marble poultice using 6 hydrogen peroxide and a few drops of ammonia.
Cleaning marble with amonia and peroxide.
Such biological stains as algae can be cleaned with cup ammonia in 1 gal.
For ink on light marble use bleach or hydrogen peroxide.
Use the cloth to rub the mixture into the marble.
A high strength hydrogen peroxide such as a 12 percent solution removes some types of stains from light colored marble.
For most organic food stains the marble institute recommends cleaning with a solution of 12 hydrogen peroxide and a few drops of ammonia.
Or try bleach or hydrogen peroxide.
Spread the solution over the surface with a soft cloth.
Then wash off with cold water.
Wipe the stains with this solution and leave on for 10 minutes.
If you spilled anything oil based like a vinaigrette.
Follow the above directions for removing rust stains from marble to effectively remove organic stains.
For removing stubborn stains from cultured marble you may require a harsher cleaner.
Add more peroxide if needed for stain removal.
Pour 1 2 cup of hydrogen peroxide into a gallon of warm water.
If you are cleaning marble floors then try using a duster or broom for this.
Mix 1 4 cup each of baking soda vinegar and ammonia and dilute it in eight cups of water.
Sweep or vacuum your marble floors on a hard floor setting to remove any dirt or debris that can scratch the floor.
Follow the above directions for removing rust stains from marble to effectively remove organic stains.
Materials that can be removed with peroxide include some inks from markers.