On light colored marble you can dilute one quart of bleach with one gallon of hot water or for a small area a size appropriate 4 1 mixture to remove the stain.
Bleach damage marble.
You can remove mold with a diluted bleach or peroxide solution but it s best.
Bleach is alkaline so it doesn t pose the big risk of acidic cleaners which dissolve sensitive stone including marble.
Before you apply the diluted bleach it is important to thoroughly wet the area with clean water.
Most commercial bathroom cleaners are too harsh to use on marble and they can etch or otherwise damage the surface.
Unfortunately most common and popular household cleaners like bleach vinegar ammonia citrus cleaners and hydrogen peroxide are too harsh for use on marble and will cause damage to the finish.
This is because these cleaners contain acidic materials or chlorine both of which can permanently damage your marble countertops or marble floors.
Bleach can be used sparingly in certain situations in a very very dilute solution but more often than not people get the mix wrong and etch their marble.
The damage from bleach stems from an entirely different characteristic.
This includes brand name cleaners as well.