Thanks for the feedback! Just picked up 2 different "TEC" grout colors: "sand" and taupe grey... I was really looking to NOT having the grout lines stand out but let the breaking light (from under cabinet halogen lights) really show the glass lines and shadows. Well, I'll do a 'dry test' today and will post the finished product later.

Thanks Ladies- such a dumb issue and yet, its just so frustrating. I just feel bad for my contractor since its really a minor thing and yet, such a nuisance item for him. He has bigger issues with her too which I feel really bad for since he has recommended her for years. Honestly, I am not even upset since I know they will make it right. I just feel badly for him- he is an awesome guy and does not deserve this crap from a dumb tile store.

I'd honestly be more concerned with how the angle is handled than grout. With multi-material mosaics each one can cut differently as each material is different. They should be able to get an angle but it's never the easiest thing because the tiles have to meet & match perfectly. I would expect that would mean 1/2 tile on each half of the corner -- so it looks like a single tile. I'd surely ask in advance at Bridge. Making that come out exactly is no easy thing. They might want to start there and work towards the corners where a different cut might be less noticeable as it's adjacent to molding or dying into the wall. I learned this because I had a 4 color tile design on my splash and it was handmade tile and not even in size. It also had to turn a corner. It might possibly be the setter wants to put a vertical line of pencil pieces over the corner and tile up to it. That slightly blunts the edge. They could use pencil pieces from the range (if they exist). Or, they could do a line of single mosaics of one material cut off the mesh (not as nice but acceptable if done well). Only way to know how it will cut is if someone had worked with that exact mosaic before. But I wouldn't want to have the setter come to that realization with wet thinset on the wall IYKWIM. Or think a crappy looking or uneven joint there will be ok when it certainly won't because it wasn't discussed and they started at the back. If someone tells you bullnose should go there, tell them you think it's too "bathroomy" and what else can you do? Might be a good idea to loop in the contractor in advance. He likely isn't focused on any of these issues. I'd ask if he could look at the time and the angle and tell you how it will look and if any special tile pieces might be needed.

Holy MOLY that's a lot of grout in a shower. Most people are trying to MINIMIZE grout and cleaning. Same for the floor - more grout, and I've never understood that bumpy stone floor look- I can't see it being comfortable on your feet or easy to squeegie and keep clean. Ultimately - you CAN get mosaics to look right but it take a ton of skill and I really questions this application.