Know all about Rhyodacite and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite belongs to Igneous Rocks while Chert belongs to Sedimentary Rocks.Texture of Rhyodacite is Earthy whereas that of Chert is Banded, Rough. Rhyodacite appears Skeletal and Chert appears Glassy or Pearly. The luster of Rhyodacite is greasy to dull while that of Chert is waxy and dull. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Chert is available in black, brown, green, grey, red, white colors. The commercial uses of Rhyodacite 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.