Know all about Slate and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Troctolite belongs to Igneous Rocks.Texture of Slate is Foliated whereas that of Troctolite is Phaneritic. Slate appears Dull and Troctolite appears Veined and Shiny. The luster of Slate is dull while that of Troctolite is not available. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Troctolite is available in dark grey to black 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 Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.