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