Pebble Shower

I have a very 80's shower. I hate pink / pink. I tiled the bathroom floor with porcelain tile Nice. I was watching HGTV and they used these tiles and pebble tiles right on tumbled marble countertops. I was wondering if I can tile on my shower tiles with these rollers. They are flat and easy to work and looks very chic and mosaic.

A horizontal surface is different from another vertical damp. I would not do it. Remove the old tile and install leaf rollers.

No, it does not go well to grasp. You'd better take the tiles and start over. This will save you hassle in the long run, when your stones begin to fall in the shower.