The following features will help you identify it: 1. On touch, porcelain has a smoother finish than ceramic tiles 2. By looking at the edge of tiles, you will know if it is ceramic or porcelain. A ceramic tile is glazed on the surface in contrast; porcelain is mostly not glazed (some are glazed, but the clay's body beneath will be of the same color). 3. Ceramic tiles will have chips in the glaze, whereas porcelain will have a consistent hue.