This (Zr,Ti)O2 structure is able to develop a rather wide chromatic palette – ranging from green and greenish yellow (Co or Ni doping) to orange-buff (Cr or V doping) and brown-tan (Fe and Mn doping) – due essentially to a selective absorption of visible light connected with crystal field electronic transitions of chromophore ions. The lack of relevant charge transfer bands in the visible spectrum results in a less pure and less saturated colour than that of current industrial ceramic pigments [2–5].