Ceramic gage blocks are a newer, but very popular option when compared to steel gage blocks. A few of the main advantages of ceramic gage blocks include the zero thermal expansion coefficient that ceramic has, the zero phase shift, and the resistance to corrosion. Due to these qualities, ceramic easily adapts to new temperatures, is not as impacted by risk of phase shift, and will last a very long time without damage from grit or humidity. In general, ceramic gage blocks are advantageous over steel gage blocks because they last a very long time without corrosion or damage. The main disadvantage of ceramic is that it is more fragile than steel. If being utilized in a context where there is risk of breakage, ceramic may not hold up quite as well. Ceramic gage blocks are an excellent choice, depending of course on your precision measurement needs.