Not much you can do about it.
Marble tile turning orange.
Well they can either be mold or iron in the water that is discoloring your grout.
The second cause is excess iron in the water.
It is for this reason that we recommend not using white marble in a shower.
It is for this reason that we recommend not using white marble in a shower.
You can recommend that your friend pulls the 3 4 tiles out and replace them.
My initial guess is that the orange stain is water damage geting under the tile maybe from the fact there seems to be no silicone joint or the fact there may be pipes in that area possibly with aleak.
Due to its abundant presence in the environment and its preference for damp conditions s.
In my case i believe it to be iron in the water since we have tried cleaning this tile to no avail for quite some time.
First of all what are those orange stains in your grout anyways.
How to clean orange stains in shower.
Try to clean it pull it out with a poultice will make it worse.
If the marble becomes wet long enough to allow moisture to leach through the marble the iron deposits will oxidize creating yellow orange brown stains.
Usually it this process occurs over a longer period but if enough moisture it could happen quickly and these tiles are thin.
If iron is present in the marble tile it will begin to oxidize when exposed to water or other oxidizers such as acids and household bleach.
Kbaby what is that to the left of the orange mark in the picture.
Orange discoloration on the tile grout in a bathroom has a couple of main causes.
Answer orange or rust like staining in stone can be caused by minerals within the stone or sometimes because the stone is in close proximity of metal.
It is rust stains that naturally occurs when the iron deposits reacts with water or repeated long term exposure to moisture.
Iron can stain the bathtub and other light colored fixtures that the water touches.
If iron is present in the marble tile it will begin to oxidize when exposed to water or other oxidizers such as acids and household bleach.
The first cause is mold which develops from the combination of moisture and warmth in the bathroom.