Know all about Theralite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Theralite and Rhyodacite belong to Igneous Rocks.Texture of Theralite is Phaneritic whereas that of Rhyodacite is Earthy. Theralite appears Veined and Shiny and Rhyodacite appears Skeletal. The luster of Theralite is waxy and dull while that of Rhyodacite is greasy to dull. Theralite is available in dark grey to black colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Theralite and Rhyodacite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.