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