Know all about Flint and Theralite properties here. All properties of rocks are important as they define the type of rock and its application. Flint belongs to Sedimentary Rocks while Theralite belongs to Igneous Rocks.Texture of Flint is Banded, Rough whereas that of Theralite is Phaneritic. Flint appears Glassy or Pearly and Theralite appears Veined and Shiny. The luster of Flint is vitreous while that of Theralite is waxy and dull. Flint is available in black, brown, green, grey, red, white colors whereas Theralite is available in dark grey to black 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 Theralite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.