Know all about Rhyodacite and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite and Variolite belong to Igneous Rocks.Texture of Rhyodacite is Earthy whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Rhyodacite appears Skeletal and Variolite appears Dull and Soft. The luster of Rhyodacite is greasy to dull while that of Variolite is not available. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Variolite is available in black, brown, light to dark grey colors. The commercial uses of Rhyodacite and Variolite are cemetery markers, creating artwork.