Know all about Teschenite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Teschenite and Rhyodacite belong to Igneous Rocks.Texture of Teschenite is Phaneritic whereas that of Rhyodacite is Earthy. Teschenite appears Veined and Shiny and Rhyodacite appears Skeletal. The luster of Teschenite is not available while that of Rhyodacite is greasy to dull. Teschenite is available in dark grey to black colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Teschenite and Rhyodacite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.