Know all about Argillite and Appinite properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Appinite belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Appinite is Porphyritic. Argillite appears Rough and Dull and Appinite appears Dull, Banded and Foilated. The luster of Argillite is waxy and dull while that of Appinite is subvitreous to dull. Argillite is available in dark grey to black, pink, red, white colors whereas Appinite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Appinite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner.