Yeah I agree, I almost mentioned that. I think what he did was install the back tile first, then install the shelf tile. That's actually the normal order to do it but in this case he didn't account for the small mosaic along with the thick shelf tile.The tiny rows of tile in the back of the niche are wrong. Should have adjusted the height to suit the tile..
If the black trim is your problem, this is probably one of the better options to add on top without ripping it out.You could get some "pencil" tiles to trim it out with. thats what i used.
Ivy Hill Tile Catalina 12" x 0.75" Ceramic Pencil Liner Tile Trim in Green | Wayfair
Just an example, i get mine from a local tile shop. but there pretty cheap and easy to work with. I'd angle grind off 1/4" or so of te black tile, and then find a pencil tile the width of the tile, or you could work out from the nook and try to hide any impefections with the same almond colored grout you got there.
I don't think anyone is suggesting that (I'm not even quite sure what you're saying, because what you seem to be saying is impossible.) We're just saying there doesn't need to be a tiny sliver of mosaic at both the bottom and the top. By shifting down the mosaic tile a quarter inch, you'd eliminate the sliver at the bottom, and create a larger partial piece at the top, but also the top edge tends to be less visible, so it's a win/win/win.I would give the mosaic background tile not even a second thought. Too much emphasis is being placed there. Note nothing the installer could do would have matched the grout lines of the mosaic to the subway.
I was just going by your words, thinking you could line up the grout lines, which you can't.I normally build my niches so the edges line up with the natural grout lines
What I was trying to say was the grout lines on the outside of the niche. I build the niche size so that to top of the niche lines up with a grout line on the wall, and the bottom of the niche does as well. Nothing can be done with the accent tile of course.I was just going by your words, thinking you could line up the grout lines, which you can't.