Know all about Slate and Scoria properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Scoria belongs to Igneous Rocks.Texture of Slate is Foliated whereas that of Scoria is Vesicular. Slate appears Dull and Scoria appears Glassy and Vesicular. The luster of Slate is dull while that of Scoria is subvitreous to dull. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Scoria is available in black, brown, dark grey to black, red 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 Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills.