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