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