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