The top picture was taken right after the install the bottom is after about two.
Marble tile getting darker.
Marble shower tile getting darker.
Since i know very little about tile and plumbing i had everything professionally installed.
If anything the marble will get darker as time goes on and the mastic continues to cure.
Most mastics turn brown over time when exposed to air.
Rust stains can usually be removed with a poultice or a non acidic rust remover.
The problem is most likely a bad installation and or cracks or voids in the grout allowing water to get trapped behind the tiles where it cannot evaporate.
If it was a tub with shower is one thing but a full shower requires the extra moisture protection especially at the base.
If you notice that the tiles in your wet area especially in the shower recess where you may have a leaking shower have changed to a darker colour the situation needs attention as soon as possible.
For instance different kinds of.
Be careful if you are removing a stain from darker colored marble as hydrogen peroxide can cause the marble to lighten.
Instead it just absorbs into the marble.
Unfortunately rust stains are the most difficult of stains to remove from marble.
Marble is a durable stone under most circumstances but it does require some special care.
Please please do consider using kerdi everywhere from and for the floor pan and up onto the walls as far as the walls could possibly get wet.
Cement board still allows water to pass through.
What type of thinset to use when installing marble tile.
It is an indication of a problem that can cause long term structural damage if left unattended.
Marble tile is just as susceptible to staining as solid marble but you can use the same method.
A simple test of this is to let the lid off the mastic container for a few days or look at the mastic trowel the next day.
It is not a problem with the tile but the installation or perhaps a serious water leak.
Marble a crystallized form of limestone is a popular choice for worktops flooring and wall tiles in both kitchens and bathrooms.
Available in a variety of colors and shades marble can be.
When installing tile in your home you can use a variety of products to adhere the tile to the substrate.
Because marble is porous you should clean spills immediately or you run the risk of the stone developing stains.
I had tile installed i my bathroom.