Properties of Nepheline Syenite and Pyroxenite play an important role in determining the type of rock. Along with Nepheline Syenite vs Pyroxenite properties, get to know more about Nepheline Syenite Definition and Pyroxenite Definition. For the ease of understanding, the properties of rocks are divided into physical and thermal properties. Rocks have a variety of properties like hardness, color, specific gravity, fracture, cleavage, luster etc. Know all about physical and thermal properties of Nepheline Syenite and Pyroxenite.