Know all about Theralite and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Theralite belongs to Igneous Rocks while Marl belongs to Sedimentary Rocks.Texture of Theralite is Phaneritic whereas that of Marl is Earthy. Theralite appears Veined and Shiny and Marl appears Rough and Dull. The luster of Theralite is waxy and dull while that of Marl is dull. Theralite is available in dark grey to black colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Theralite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones and that of Marl are creating artwork, soil conditioner.