Know all about Gossan and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Nephelinite belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Nephelinite is Aphanitic. Gossan appears Dull and Banded and Nephelinite appears Skeletal. The luster of Gossan is metallic while that of Nephelinite is vitreous to metallic. Gossan is available in brown, brown- black, gold, green, rust colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).