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