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