Know all about Gossan and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Marl belongs to Sedimentary Rocks.Texture of Gossan is Rough, Sandy whereas that of Marl is Earthy. Gossan appears Dull and Banded and Marl appears Rough and Dull. The luster of Gossan is metallic while that of Marl is dull. Gossan is available in brown, brown- black, gold, green, rust colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Marl are creating artwork, soil conditioner.