Know all about Mudstone and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Mudstone belongs to Sedimentary Rocks while Variolite belongs to Igneous Rocks.Texture of Mudstone is Clastic whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Mudstone appears Rough and Dull and Variolite appears Dull and Soft. The luster of Mudstone is dull while that of Variolite is not available. Mudstone 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 Mudstone are creating artwork, pottery and that of Variolite are cemetery markers, creating artwork.