Characteristics related to grain size of rocks are called as texture. Here you can know more about texture of Nepheline Syenite and Greywacke. Texture of Nepheline Syenite is whereas that of Greywacke is . Based on the texture of rocks, they are used for various purposes. Get detailed information about Nepheline Syenite vs Greywacke texture, color, appearance and maintenance in the next section.