I love the idea of black glass in contrast with natural or warm spaces, like wood or warm stone. There's a contrast in temperature, as well as quality of material. To me, wood is organic and connected to emotion while black glass is sleek and impartial.
Love the use of copper that looks like pennies in this bathroom. (Hmm copper pennies are a very inexpensive floor!) Goes very well with the long slabs of stone tile. Open shower and giant soaker tub beautiful and easy to clean
Ferrara Natural Travertine with Natural Chocolate Marble & Glass Mosaic Tiles. Using the marble & glass tiles along with the travertine adds a burst of glamour into your walls whilst keeping to luxury natural materials. This look is great as a splash back