"Architectural masonry is the evolvement of normal concrete masonry blocks into aesthetically pleasing concrete masonry units (CMUs)".[5][failed verification] CMUs could be produced to supply various floor appearances. They can be colored during manufacturing or stained or painted after set up. They are often split as part of the producing system, https://pressadvantage.com/story/45896-west-hills-masonry-paves-new-partnership-with-bliss-drive