Pebbles were in Vogue some years ago. They have pretty much disappeared from pages of magazines and design books, but once a while one comes across a lovely space that features pebbles. The key is to use them in a clean fashion either on wall or floor, and contrast them with smooth surfaces of modern fixtures or large tiles. Many manufacturers carry variety of pebble tiles. Some of them are: NY Stone, Nemo Tile, Porcelanosa and Coverallstone.com.