Know all about Chert and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Variolite belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Chert appears Glassy or Pearly and Variolite appears Dull and Soft. The luster of Chert is waxy and dull while that of Variolite is not available. Chert is available in black, brown, green, grey, red, white colors whereas Variolite is available in black, brown, light to dark grey colors. The commercial uses of Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms and that of Variolite are cemetery markers, creating artwork.