Answer answer as long as the existing marble floor is structurally sound and well bonded to its substrate without excessive deflection you can bond over the marble.
Can you put tile over marble.
Can you tile over tile in order to save time.
The marble surface is likely polished or honed and it might have a sealer on it or contaminates from pass use.
Covering the cultured marble walls is not a good idea.
But the tcna and i both agree you can install over existing tile.
It avoids the time consuming messy tear out process.
I would recommend first scarifying the surface of the marble.
Leave a 1 16 inch space between each tile to create a very thin grout line.
Grind them down with a grinder.
Did you know that with a little adhesive you can apply tile right over the face of the marble fireplace surround and create a whole new look.
If your tiles are in relatively good condition evenly placed without cracks and not appearing to retain.
Technically it can be done but in practice it is avoided.
Press the tile onto the floor.
You can lay new ceramic tile right over the old using the prep techniques we show here.
Being that it is marble a precious rock you may want to remove carefully and bag it up for possible later use in a wall or a tumbled shower pan.
Overcoming problems with tile over a marble fireplace marble is smooth and nonporous which are both good qualities for a finished surface but poor ones for a tile substrate.
Roughen the tile with 80 grit sandpaper.
My peachy beige fireplace surround one of the first things i said when i did the final walk through of my new construction home was that isn t the marble i picked for the fireplace.
Install the tile into the desired location.
Lay a level on the old tile and mark any high spots.
Continue to spread mortar and lay the marble tiles until you have covered the entire floor.
Cut the marble tiles to fit as necessary with a wet saw.
If you really want to be on the safe side you can always install a cement backer board before you lay the tiles.
Apply gentle but firm pressure to the tile as you press it into the thinset moving it slightly in all directions to ensure a complete and total bond with the adhesive.
The short answer is most likely yes.