Know all about Marl and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Marl belongs to Sedimentary Rocks while Nephelinite belongs to Igneous Rocks.Texture of Marl is Earthy whereas that of Nephelinite is Aphanitic. Marl appears Rough and Dull and Nephelinite appears Skeletal. The luster of Marl is dull while that of Nephelinite is vitreous to metallic. Marl is available in beige, brown, green, grey, white colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).