Know all about Argillite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Slate belongs to Metamorphic Rocks.Texture of Argillite is Clastic, Polished whereas that of Slate is Foliated. Argillite appears Rough and Dull and Slate appears Dull. The luster of Argillite is waxy and dull while that of Slate is dull. Argillite is available in dark grey to black, pink, red, white colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that 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.