Know all about Nephelinite and Gneiss properties here. All properties of rocks are important as they define the type of rock and its application. Nephelinite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks.Texture of Nephelinite is Aphanitic whereas that of Gneiss is Banded, Foliated, Platy. Nephelinite appears Skeletal and Gneiss appears Foliated. The luster of Nephelinite is vitreous to metallic while that of Gneiss is dull. Nephelinite is available in black, brown, colourless, green, grey, white colors whereas Gneiss is available in black, brown, pink, red, white colors. The commercial uses of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo) and that of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums.