Those are quite beautiful... and remind me of the way there seems to be more "pride in public spaces" in many parts of Europe.

I spent my teen years (and a bit more) in the south of Spain which in many places has a similar mosaic tradition for public pavements. Instead of cobblestones, they actually use smaller beach pebbles, generally very FLAT and set on end. They are sorted into dark/black, pale/white and reddish and used to create pavement patterns... I believe the original inspiration is primarily Moorish, although they are known as "Empedrados Granadinos" (loosely translates as "Granada style embedded stones").