You should post this on the bathroom forum. There was recently a huge post about a porcelain tile that looks like marble. I do know that daltile and American Olean both make good marble look a likes.

I just tiled my bathroom in Porcelanosa Marmol Blanco Carrera. It is a white background with gray lines, ink jet technology so all tiles are different even though you do see the same design sometimes but moved over a bit on the tile, just like real slabs do when they are slices out of the same block. It is also rectified so the edges are squared off. They are 35 1/2" wide by 12 1/2" tall. They also have a floor tile to go with it that is square about 16 or 18". They are beautiful.