Know all about Variolite and Limestone properties here. All properties of rocks are important as they define the type of rock and its application. Variolite belongs to Igneous Rocks while Limestone belongs to Sedimentary Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Limestone is Clastic or Non-Clastic. Variolite appears Dull and Soft and Limestone appears Rough and Banded. The luster of Variolite is not available while that of Limestone is dull to pearly. Variolite is available in black, brown, light to dark grey colors whereas Limestone is available in beige, black, blue, brown, cream, gold, green, grey, light green, light grey, linen, pink, red, rust, silver, white, yellow colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Limestone are animal feed filler, as a feed additive for livestock, paper industry, raw material for manufacture of quicklime, slaked lime, soil conditioner, used in aquariums, whiting material in toothpaste, paint and paper.