When marble is damaged.
Bleach damage marble.
Before you apply the diluted bleach it is important to thoroughly wet the area with clean water.
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.
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.
This includes brand name cleaners as well.
The damage from bleach stems from an entirely different characteristic.
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.
You can remove mold with a diluted bleach or peroxide solution but it s best.
Almost every guide for the care and maintenance of marble warns that you should not use bleach vinegar or other harsh cleaners.
Most commercial bathroom cleaners are too harsh to use on marble and they can etch or otherwise damage the surface.