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