Know all about Rhyodacite and Pyrolite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite and Pyrolite belong to Igneous Rocks.Texture of Rhyodacite is Earthy whereas that of Pyrolite is Phaneritic. Rhyodacite appears Skeletal and Pyrolite appears Rough and Shiny. The luster of Rhyodacite is greasy to dull while that of Pyrolite is shiny. Rhyodacite and Pyrolite are available in black to grey, dark greenish - grey colors. The commercial uses of Rhyodacite are cemetery markers, creating artwork and that of Pyrolite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.