Know all about Gneiss and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Gneiss belongs to Metamorphic Rocks while Nepheline Syenite belongs to Igneous Rocks.Texture of Gneiss is Banded, Foliated, Platy whereas that of Nepheline Syenite is Granular. Gneiss appears Foliated and Nepheline Syenite appears Banded and Foilated. The luster of Gneiss is dull while that of Nepheline Syenite is greasy to dull. Gneiss is available in black, brown, pink, red, white colors whereas Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums and that of Nepheline Syenite are cemetery markers, creating artwork.