Know all about Phonolite and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Phonolite belongs to Igneous Rocks while Chert belongs to Sedimentary Rocks.Texture of Phonolite is Granular whereas that of Chert is Banded, Rough. Phonolite appears Banded and Foilated and Chert appears Glassy or Pearly. The luster of Phonolite is greasy to dull while that of Chert is waxy and dull. Phonolite is available in brown, buff, cream, green, grey, pink, white colors whereas Chert is available in black, brown, green, grey, red, white colors. The commercial uses of Phonolite are cemetery markers, creating artwork and that of Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms.