Know all about Slate and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Argillite belongs to Sedimentary Rocks.Texture of Slate is Foliated whereas that of Argillite is Clastic, Polished. Slate appears Dull and Argillite appears Rough and Dull. The luster of Slate is dull while that of Argillite is waxy and dull. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates and that of Argillite are fire resistant, used to manufracture paperweights and bookends.