Know all about Chert and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Chert appears Glassy or Pearly and Trachyandesite appears Dull and Soft. The luster of Chert is waxy and dull while that of Trachyandesite is earthy. Chert is available in black, brown, green, grey, red, white colors whereas Trachyandesite 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 Trachyandesite are creating artwork, pottery.