Know all about Tonalite and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Tonalite belongs to Igneous Rocks while Marl belongs to Sedimentary Rocks.Texture of Tonalite is Phaneritic whereas that of Marl is Earthy. Tonalite appears Banded and Foilated and Marl appears Rough and Dull. The luster of Tonalite is subvitreous to dull while that of Marl is dull. Tonalite 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 Tonalite are cemetery markers, creating artwork and that of Marl are creating artwork, soil conditioner.