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