It seems like just about every material imaginable will eventually be used within 3D Printers. There are already dozens of materials out there today being printed with. Having said this, color is lacking in many of the printers offering. An Israeli company called Studio Under is working on bringing to market a 3D Printer which prints in multiple colors and uses a ceramic material. Check out some of their work. Not perfect, but a step in the right direction for sure:



Here is a video of the ceramic color 3D Printer in action: