What is the difference between glazed and unglazed tile?

Glazed tile is coated with a surface finish (glaze) fused to the body by firing at very high temperatures. Because of the ease of adding color, pattern and texture to the glaze, style, color and design are virtually unlimited. The color of unglazed tile results from the natural clay of the tile body or pigment added to the clay. The colors are more limited but because that color extends throughout the tile, wear is not visible. Unglazed tile is, therefore, an excellent choice for the most heavily trafficked areas.

Will ceramic tile break or chip?

Ceramic tile is more susceptible to breaking before installation than after. After proper installation, it is very difficult to break or chip tile unless it is hit with a heavy object such as a hammer having a small impact area. Structural breaks can occur if there is movement in the substrate. If damaged, individual tiles can be replaced.