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