About Stone Medallions : Natural stone floor medallions are manufactured by cutting natural stones such as marble, granite, travertine with a water jet machine and mounting them on a solid support with epoxy and fiberglass mesh as tightly as possible. Some floor rosettes are manufactured by assembled small stone pieces like mosaic patterns. In water jet medallions, stone pieces are polished and sealed, and there are no gaps or grout between individual pieces. You don't have to worry about cleaning the grout or matching the grouts in color. The availability of computerized waterjet equipment allows us to cut stone to incredibly close tolerances.