Know all about Chert and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Trondhjemite belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Trondhjemite is Phaneritic. Chert appears Glassy or Pearly and Trondhjemite appears Banded and Foilated. The luster of Chert is waxy and dull while that of Trondhjemite is subvitreous to dull. Chert 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 Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms and that of Trondhjemite are cemetery markers, creating artwork.