The source of these pictures is the designer www.rosabeltrandesign.com . She did a great job with the grout joints. I have a fondness of the big grout joint even though the world has moved away from it she nailed it. Also she lacquered up the floor. Even though it may actually not be lacquer it gives the impression of an old school sealer. Yet the color of the floor keeps in fresh .
On a different note what do you call this shape ( the conche )?