Hello basil87! The vanity top is made of Calacatta marble. We can do the similar vanity top if you are interested in it. We also have a wide selection of marble slabs available, such as Bianco Carrera (White Carrara), Bianco Dolomiti (White Dolomite), Bardiglio Gray, Nero Marquina Black, White Onyx and Crema Marfil.
If you have more questions, please contact us via phone or mail:http://www.carraratiles.com/contact-us.html

Looks like BM cos cob stonewell

could also be BM lampblack

Try Storm Cloud Gray & Chelsea Gray & Sabre Gray from Benjamin Moore. The vanity was custom built but Restoration Hardware probably has something similar or show this picture to a fine carpenter in your area.