Know all about Marl and Shale properties here. All properties of rocks are important as they define the type of rock and its application. Marl and Shale belong to Sedimentary Rocks.Texture of Marl is Earthy whereas that of Shale is Clastic, Splintery. Marl appears Rough and Dull and Shale appears Muddy. The luster of Marl and Shale is dull. Marl is available in beige, brown, green, grey, white colors whereas Shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Shale are creating artwork, pottery.