Know all about Gossan and Ganister properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Ganister belongs to Sedimentary Rocks.Texture of Gossan is Rough, Sandy whereas that of Ganister is Clastic, Granular, Rough. Gossan appears Dull and Banded and Ganister appears Rough. The luster of Gossan is metallic while that of Ganister is dull. Gossan is available in brown, brown- black, gold, green, rust colors whereas Ganister is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Ganister are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.