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