Know all about Ganister and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Ganister belongs to Sedimentary Rocks while Variolite belongs to Igneous Rocks.Texture of Ganister is Clastic, Granular, Rough whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Ganister appears Rough and Variolite appears Dull and Soft. The luster of Ganister is dull while that of Variolite is not available. Ganister and Variolite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Ganister are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones and that of Variolite are cemetery markers, creating artwork.