The walls are Calacatta so I would say they carrier the design onto the shower floor and went for a 2" Hexagon Calacatta. But the Calacatta they chose is a slightly different grade with more black and grays than gold. But it still works due to the overall white base of the white of the tile.

That is the trick to Calacatta if you can get the white base you can almost be forgiven for any of the other less desirable characteristics. In my opinion a great choice. Very pretty. Our Calacatta 2" Hexagon has the white base but is more of a Oro or Gold. Picture attached we sell this for $15.95 a square foot.