Know all about Slate and Hornfels properties here. All properties of rocks are important as they define the type of rock and its application. Slate and Hornfels belong to Metamorphic Rocks.Texture of Slate is Foliated whereas that of Hornfels is Granular, Platy. Slate appears Dull and Hornfels appears Dull. The luster of Slate is dull while that of Hornfels is shiny. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Hornfels is available in brown, dark greenish - grey, green, reddish brown 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 Hornfels are cemetery markers, commemorative tablets, creating artwork.