Know all about Trachyandesite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite and Nephelinite belong to Igneous Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Nephelinite is Aphanitic. Trachyandesite appears Dull and Soft and Nephelinite appears Skeletal. The luster of Trachyandesite is earthy while that of Nephelinite is vitreous to metallic. Trachyandesite is available in black, brown, light to dark grey colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).