Schist is one of the important type of rocks. If we have to define Schist in general, Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation. Schist comes under Metamorphic Rocks. All Metamorphic Rocks have similar properties and formation process. Along with Schist Definition, know more about the History of Schist, Etymology of Schist in next sections.