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