Know all about Variolite and Arkose properties here. All properties of rocks are important as they define the type of rock and its application. Variolite belongs to Igneous Rocks while Arkose belongs to Sedimentary Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Arkose is Clastic. Variolite appears Dull and Soft and Arkose appears Rough and Dull. The luster of Variolite is not available while that of Arkose is dull. Variolite is available in black, brown, light to dark grey colors whereas Arkose is available in reddish brown colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones.