Here is a picture of the first section, most of the cuts were just cutting the tile in half for the top and bottom of the diamond portion. The only other ones were around the outlets and a few at the ends of the walls. I'm using 4x4 Country Beige travertine with a 1/16th in. grout line.
Here are a couple after pictures:
The black circle is the water line for a pot filler.
This afternoon comes the grout.