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