Know all about Shale and Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Porphyry belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Porphyry is Porphyritic. Shale appears Muddy and Porphyry appears Dull. The luster of Shale and Porphyry is dull. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. The commercial uses of Shale are creating artwork, pottery and that of Porphyry are creating artwork, gemstone, jewelry.