Abstract: A method of making terrazzo floors with design inlays. The method utilizes pre-molded inserts as inlays in the finished floor, and generally includes four steps. First, inserts are pre-molded, which has design elements in terms of their color, nature of inclusions (chips, glass fragments, etc. and their colors), shape and/or a pattern of grooves in their upper surfaces. Second, the pre-molded inserts are placed on and affixed to the sub-flooring in a predetermined arrangement. Third, epoxy flooring mixture is poured to a height that fills the grooves in the inserts' upper surfaces and preferably cover the inserts. Fourth, the floor, after cured and hardened, is ground and polished to expose the upper surfaces of the inserts, which now become seamlessly integrated inlays within the overall finished floor.