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