Know all about Phonolite and Gossan properties here. All properties of rocks are important as they define the type of rock and its application. Phonolite belongs to Igneous Rocks while Gossan belongs to Metamorphic Rocks.Texture of Phonolite is Granular whereas that of Gossan is Rough, Sandy. Phonolite appears Banded and Foilated and Gossan appears Dull and Banded. The luster of Phonolite is greasy to dull while that of Gossan is metallic. Phonolite is available in brown, buff, cream, green, grey, pink, white colors whereas Gossan is available in brown, brown- black, gold, green, rust colors. The commercial uses of Phonolite are cemetery markers, creating artwork and that of Gossan are cemetery markers, commemorative tablets, gemstone.