Colored translucent zirconia sintered body and its use

A colored translucent zirconia sintered body which comprises from 2 to 4 mol % of yttria, less than 0.01 wt %, as calculated as CoO, of cobalt oxide, at least 20 and less than 2,000 ppm, as calculated as Fe2O3, of an iron oxide, at least 0.005 and less than 0.2 wt % of Al2O3 and the rest being zirconia, and which has a lightness L* of from 50 to 75, a* of from −1 to 10 and b* of from 0 to 30 as chromatic parameters stipulated in JIS-Z8729, has a relative density of at least 99.80% and has a total light transmittance of at least 18% and at most 40% as measured at a sample thickness of 1 mm using a D65 light source.

A pink-colored zirconia sintered body which is stabilized solely by erbia (Er2O3) or stabilized by yttria (Y2O3) and erbia (Er2O3), further contains at least 0.005 wt % and less than 0.2 wt % of alumina, and contains, when stabilized solely by erbia, at least 2 mol % and less than 4 mol % of erbia, or, when stabilized by erbia and yttria, at least 0.1 mol % and less than 2 mol % of erbia and at least 1 mol % and less than 4 mol % of yttria, and which has a lightness L* of from 58 to 75, a* of from 3 to 20 and b* of from −8 to −4 as chromatic parameters stipulated in JIS-Z8729.