Know all about Flint and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Flint belongs to Sedimentary Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Flint is Banded, Rough whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Flint appears Glassy or Pearly and Trachyandesite appears Dull and Soft. The luster of Flint is vitreous while that of Trachyandesite is earthy. Flint 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 Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Trachyandesite are creating artwork, pottery.