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