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