Know all about Scoria and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Scoria belongs to Igneous Rocks while Marl belongs to Sedimentary Rocks.Texture of Scoria is Vesicular whereas that of Marl is Earthy. Scoria appears Glassy and Vesicular and Marl appears Rough and Dull. The luster of Scoria is subvitreous to dull while that of Marl is dull. Scoria is available in black, brown, dark grey to black, red colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills and that of Marl are creating artwork, soil conditioner.