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