I don't think those work together. Pick a fun mosaic tile in white ceramic or porcelain. Penny rounds, herringbone, hexes, pickets, etc.

As for the counters, I'd go with either a solid white or a faux Crema Marfil to complement the goldish veining in the 12 x 24 tile.

The Mayfair Calacatta Oro line has mosaic styles and a small arabesque that might work well for your floor choice. I don't think the pebble you've shown goes well with the polished and more classic looking wall tile.

Mayfair - Anatolia Tile + Stone · More Info

Looks like both the hex and basketweave come in a matte finish. That might be a good choice for the shower base.

Mayfair - Anatolia Tile + Stone · More Info

Mayfair - Anatolia Tile + Stone · More Info

They also have one called Piazza mosaics but they don't give the dimensions on their site. But I'd ask your tile supplier if they have some samples you can look at.

You mentioned you're doing the herringbone on the floor. Just to keep things all the same shape, my choice would be the basketweave for the shower floor. The hex is also nice, but I feel sometimes mixing shapes is a little less cohesive. I think it sounds like a really lovely choices for your washroom.

Love the hex or basketweave!!

will the herringbone pattern on the floor work w/ 12x24s in the shower

yes it will. And do one of the mosaics on your shower floor in the same line as the wall tile

basketweave

if you choose something like the basketweave, you could do it on the shower floor and the outside floor. if you like the herringbone, do it on one full wall in the shower, and the other two walls in the 12x24

hard to find a pic. this is a smaller size herringbone.

I would move up to the 24x24 size if they have it. The pattern is less chopped up and you have less grout. I am going with 30x30 in a larger shower, even less grout!

Did you end up going with the mayfair calcatta tile? How does the finished product look?

If you use the mosaic only in the shower, the result will be spectacular. the shades match and it is important to have contrasts in the settings. Yes, you can do this combination.

To create color accents, you can use the stone in dark colors like these:

https://www.piatraonline.com/silver-polished-slate-countertop-250-x-65-x-3-cm

https://www.piatraonline.com/nero-marquina-marble-polished-countertop-250-x-65-x-3-cm

Or you can use a countertop in the same shades:

https://www.piatraonline.com/calacatta-lucina-autograph-marble-polished-slabs-2-cm

https://www.piatraonline.com/volakas-polished-marble-slabs-3-cm