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