Know all about Slate and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Slate is Foliated whereas that of Itacolumite is Clastic, Granular, Rough. Slate appears Dull and Itacolumite appears Rough. The luster of Slate and Itacolumite is dull. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Itacolumite is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow 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 Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.