Tonalite is one of the important type of rocks. If we have to define Tonalite in general, Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. Tonalite comes under . All Igneous Rocks have similar properties and formation process. Along with Tonalite Definition, know more about the History of Tonalite, Etymology of Tonalite in next sections.