Tiling 45deg corner with stone cladding - how to cut

[Greggerly]

hi guys
I've started tiling my media wall with stone cladding and hit a brick wall. I need to tile the corners and since the cladding I've bought doesn't offer corner tiles I will need to cut it myself. Normal 45 deg cut won't work as the cladding I have varies in thickness (stone-like effect) and the pieces won't match. I'll add that they have kinda shiny effect to them so color on the cut is different and there are filling stones inside with completely different color - it just doesn't look good at all.

I don't want to use corner trims as they don't look good. At least those I've found so far. Also simply butting them against each other wont work as they are quite thick (between 1.5 - 2.5cm) so a large gap will be visible. Any idea how to cut it to make it look good?
The only idea I have so far is to do a 45 deg undercut on the edge of the tile so the 45 angle will be on the bottom part of the tile. Without cutting through protruding pieces of the tile. This way I can bridge the gap between the tiles on the corner without cutting through the nice-looking stone effect on the top.
Any suggestions welcome.

 

[ktuludays]

Would running a vertical line of those up in the corner do the job?

 

[Greggerly]

not really. those tiles are quite large and I dont think it would look any good. not to mention that media wall have quite thin frame around the TV meaning i would need to chop them alongside which is pain in the butt.
tried various cuts and after my futile efforts, I've decided that I will need to live with the edge trim. managed to find matt black alu trim that might do the job. should arrive this week so let see how it turns out.
but it's a good lesson to keep in mind where tile will be applied before buying them. in all honesty it never crossed my mind and I've solely focused on the look of the tiles