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