Three different colors, white, black, pink, with three different types (polished, semi-polished, rough) of ceramic Zirconia. This material uses SSS so it will work best with water tight meshes. You will most likely get artifacts in your render if the model has holes or open sides.
Because a very dense SSS is needed to achieve the correct look, the material will need at least SL 18 to render clean. The shiny white version being the slowest to render clean (this depends of course on the lighting setup and model as well). The rough versions of the materials will render the fastest.