Know all about Variolite and Claystone properties here. All properties of rocks are important as they define the type of rock and its application. Variolite belongs to Igneous Rocks while Claystone belongs to Sedimentary Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Claystone is Clastic. Variolite appears Dull and Soft and Claystone appears Rough and Dull. The luster of Variolite is not available while that of Claystone is dull. Variolite is available in black, brown, light to dark grey colors whereas Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Claystone are pottery.