Ceramic is a manufactured product issued from a mix of clay and silica, pressed and baked at a very high temperature. Ceramic is a non-limestone product which has some interesting features : it is not porous, it does not fear the heat, nor acids, nor UV.
The polished ceramic must be treated against spots but the mat ceramic doesn't need any protection. This product is nevertheless susceptible to impacts, mainly at the edges of the kitchen counter. Avoid under-recessed sink. The choice of ceramic is a choice of modernity.
Like for all manufactured goods, every supplier has his own quality tolerances. Take a look at the video hereunder (in French) to know how to do the maintenance of your ceramic in everyday life.