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