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