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