Due to accidents or lack of care, you may need to replace a particular marble mosaic tile if any repairing attempts have become futile. As long as you exercise caution, it is not a difficult task. It is crucial to apply just enough pressure to manage to remove it successfully, without negatively affecting the nearby tiles. Here is an outline of how to best go about it.
Step 1 - Loosening the Broken Tile
Start loosening the grout from around the particular tile you wish to replace with a utility knife. You need to act with utmost caution so as to avoid damaging the nearby tiles in the process.
Step 2 - Fragmenting the Tile
Then, start tapping on the tile's surface with a hammer. While doing this the tile's surface should start to crack up little by little, and this will facilitate its removal. After a few taps, use a chisel as well to help remove the fragments. In the process you have to try to avoid prying the pieces away. This will likely cause damage to the substrate of the tile. Instead, try to pull the tile's fragments off carefully.
Step 3 - Cleaning the Area
Once all the fragments have been removed, clean the area properly. This is important in order to prepare a suitable foundation for the new tile.
Step 4 - Laying the New Tile
Now, cover the patch with a layer of marble thinset and carefully lay the new tile in the space. Apply pressure to make it adhere properly. Clean any residue afterwards.