We had a stone floor installed in our shower. The stones came on 1' x 1' "sheets". The installer kept the stones on the backing, and now you can clearly see lines in both directions where each 1' section meets.
I've seen other showers where the stones are randomly placed so they don't look like tiles.
Is it reasonable for me to have the installer re-do it, or is it normal for those tiles to be installed that way?
Here is a photo (ignore the wet part):