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