Know all about Flint and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Flint belongs to Sedimentary Rocks while Trondhjemite belongs to Igneous Rocks.Texture of Flint is Banded, Rough whereas that of Trondhjemite is Phaneritic. Flint appears Glassy or Pearly and Trondhjemite appears Banded and Foilated. The luster of Flint is vitreous while that of Trondhjemite is subvitreous to dull. Flint is available in black, brown, green, grey, red, white colors whereas Trondhjemite is available in black, brown, light to dark grey, white 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 Trondhjemite are cemetery markers, creating artwork.