This is called a trough sink. I would search the web for "modern bathroom trough sink" for a wide variety of manufacturer's.

Most likely this is made of stone or concrete, some companies offer stone sinks but not like this, most likely this is custom made.
If you decided to explore the concrete option (less expensive) make sure that the maker have good sealers. I'm attaching a picture of concrete sink that had ordered custom from a local concrete artist (Calgary, AB)

catalano verso puetraserena

We design and fabricate custom concrete sinks of all shapes and sizes
http://www.elementsconcrete.com/gallery_group.php?groupID=5

The sink looks Like a Catalano versoventicinque from Italy and distributed in USA by Catalano-USA. They do make both the dark stone finish and a light travertine version and they are available in many sizes. List prices range from $900.00 to about $2,000.00 for large basins but nobody pays list.