for making cement decorative hand made cement tile there is device sometime call cookie cutter also to portrait some design is called divider
The metal frame that divides the tile into different sections is made from strips of metal carefully bent and soldered into place. I have seen steel ones and also brass mold patterns. The key to it is to have the bottom of the strips perfectly flat and level so that when you pour in the liquid cement mix, each color stays in its own compartment. See the link below to see a mold pattern and also the finished tile from it. A lot of history and more photos are on the second link.
