Know all about Gossan and Basaltic Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Basaltic Trachyandesite belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Basaltic Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Gossan appears Dull and Banded and Basaltic Trachyandesite appears Dull and Soft. The luster of Gossan is metallic while that of Basaltic Trachyandesite is not available. Gossan is available in brown, brown- black, gold, green, rust colors whereas Basaltic Trachyandesite is available in black, brown, light to dark grey colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Basaltic Trachyandesite are an oil and gas reservoir, commemorative tablets, creating artwork.