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