Know all about Ijolite and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Ijolite belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Ijolite is Earthy, Granular whereas that of Argillite is Clastic, Polished. Ijolite appears Banded and Foilated and Argillite appears Rough and Dull. The luster of Ijolite is greasy to dull while that of Argillite is waxy and dull. Ijolite is available in brown, buff, cream, green, grey, pink, white colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Ijolite are cemetery markers, creating artwork and that of Argillite are fire resistant, used to manufracture paperweights and bookends.