Nepheline Syenite is one of the important type of rocks. If we have to define Nepheline Syenite in general, Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz. Nepheline Syenite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Nepheline Syenite Definition, know more about the History of Nepheline Syenite, Etymology of Nepheline Syenite in next sections.