Know all about Pegmatite and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Pegmatite belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Pegmatite is Pegmatitic whereas that of Argillite is Clastic, Polished. Pegmatite appears Layered, Banded, Veined and Shiny and Argillite appears Rough and Dull. The luster of Pegmatite is grainy, pearly and vitreous while that of Argillite is waxy and dull. Pegmatite is available in black, brown, cream, green, grey, pink, red, rust, silver, white, yellow colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Pegmatite are creating artwork, jewelry, source of corundum, tourmalines, beryls and topaz and that of Argillite are fire resistant, used to manufracture paperweights and bookends.