Know all about Troctolite and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite belongs to Igneous Rocks while Marl belongs to Sedimentary Rocks.Texture of Troctolite is Phaneritic whereas that of Marl is Earthy. Troctolite appears Veined and Shiny and Marl appears Rough and Dull. The luster of Troctolite is not available while that of Marl is dull. Troctolite is available in dark grey to black colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Marl are creating artwork, soil conditioner.