Know all about Nepheline Syenite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Nepheline Syenite and Rhyodacite belong to Igneous Rocks.Texture of Nepheline Syenite is Granular whereas that of Rhyodacite is Earthy. Nepheline Syenite appears Banded and Foilated and Rhyodacite appears Skeletal. The luster of Nepheline Syenite and Rhyodacite is greasy to dull. Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Nepheline Syenite and Rhyodacite are cemetery markers, creating artwork.