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