Blueschist is one of the important type of rocks. If we have to define Blueschist in general, Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature. Blueschist comes under Igneous Rocks. All Metamorphic Rocks have similar properties and formation process. Along with Blueschist Definition, know more about the History of Blueschist, Etymology of Blueschist in next sections.