Know all about Flint and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Flint belongs to Sedimentary Rocks while Nepheline Syenite belongs to Igneous Rocks.Texture of Flint is Banded, Rough whereas that of Nepheline Syenite is Granular. Flint appears Glassy or Pearly and Nepheline Syenite appears Banded and Foilated. The luster of Flint is vitreous while that of Nepheline Syenite is greasy to dull. Flint is available in black, brown, green, grey, red, white colors whereas Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Nepheline Syenite are cemetery markers, creating artwork.