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