Know all about Porphyry and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Porphyry is Porphyritic whereas that of Argillite is Clastic, Polished. Porphyry appears Dull and Argillite appears Rough and Dull. The luster of Porphyry is dull while that of Argillite is waxy and dull. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry and that of Argillite are fire resistant, used to manufracture paperweights and bookends.