Tile and stone are water-resistant, easy-clean [1] materials that offer a variety of design looks, from rustic natural to high-concept patterns and palettes. Proper abrasion resistance (PEI rating) prevents slips and slides. However, these floors can be hard and cold underfoot. Cracked and otherwise damaged tiles are difficult to replace and the surface may require occasional sealing and regrouting [2].
Links:
[1] http://www.moneypit.com/audio-q-a/how-clean-natural-stone-floor-tile
[2] http://www.moneypit.com/audio-q-a/travertine-grouting-tips