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