These first two photos show how you can "tile in" or flush mount your switch plates if we don't radius the edges. The best way to do this is to get your switch plates first, install them, and then tile around them without grouting them in. This customer installed plastic switchplates, tiled around them, purchased the stone switch plates, and then grouted them in. Tiling in your switchplates does add quite a bit more work but it is rather unique.
This next group of photos are of magnetic granite switch cover plates.
The next two rows are screw mounted travertine switch plates.
Below are some magnetic porcelainized ceramic switch plate covers.
