Know all about Gossan and Theralite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Theralite belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Theralite is Phaneritic. Gossan appears Dull and Banded and Theralite appears Veined and Shiny. The luster of Gossan is metallic while that of Theralite is waxy and dull. Gossan is available in brown, brown- black, gold, green, rust colors whereas Theralite is available in dark grey to black colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Theralite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.