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