Know all about Diorite and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Diorite belongs to Igneous Rocks while Marl belongs to Sedimentary Rocks.Texture of Diorite is Phaneritic whereas that of Marl is Earthy. Diorite appears Shiny and Marl appears Rough and Dull. The luster of Diorite is shiny while that of Marl is dull. Diorite is available in black, brown, light to dark grey, white colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Diorite are creating artwork, curling and that of Marl are creating artwork, soil conditioner.