Iron deposits that are embedded in white marble tile especially carrara marble are typically the cause of this type of stain.
Marble shower floor turning yellow.
If this process is applied to a white marble floor that contains moisture it will turn the marble yellow.
The bottoms of ones shoe acts like sandpaper on a stone floor surface and over time will wear the polish off.
A yellow brownish stain has begun to appear on the marble bench slab.
I was able to scratch the brown away with my thumbnail revealing the original beautiful marble.
In fact waxy coatings of urethane and other materials may be the reason your white marble floors have turned yellow see it here.
It started out faint has gotten brighter and appears to be growing.
Get rid of nasty yellow stains in your plastic bathtub using hydrogen peroxide.
I had used a commercial sealer on my marble before using my shower for the first time about 3 years ago.
If these deposits are exposed to water they can rust and leach through to the surface causing the yellow brown stains.
Another possibility is a process sometimes used for polishing marble floors known as crystallization.
It is for this reason that we recommend not using white marble in a shower.
Step 2 move the shower curtain and any fabric items such as bath mats towels and washcloths into a safe location.
The classic look of a bianco carrara or calacatta gold bath is popular and the current availability of field in a variety of finishes and textures like honed polished tumbled hand antiqued marmo antico brushed etc moldings and mosaics allow for many design options.
Floor coatings designed for wood concrete or even other kinds of natural stone may not work well for marble floors.
This is especially true of marble since it is much softer then granite.
I would strongly suggest having this done by a professional.
Cultured marble may yellow over time for various reasons.
This oxidation process is accelerated when the tile is saturated as in the flood in the above example.
If the gel coating has worn down a bit the coating and cultured marble may become stained.
If the marble tile has been crystallized it will be necessary to remove the crystallized layer with a powder polish containing oxalic acid.
White marble tiles can remain for years without yellowing then over time may slowly turn yellow and in severe causes may turn completely brown.
Why is my white marble turning yellow.
To remove yellowing due to a wax or coating buildup the marble will need to stripped with a commercial wax stripper.
If this process is applied to a white marble floor that contains moisture it will turn the marble yellow.
Step 1 fill a spray bottle with 3 percent hydrogen peroxide which is found in drugstores or convenience stores for a minimal price.