Know all about Icelandite and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite belongs to Igneous Rocks while Chert belongs to Sedimentary Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Chert is Banded, Rough. Icelandite appears Dull and Soft and Chert appears Glassy or Pearly. The luster of Icelandite is vitreous while that of Chert is waxy and dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Chert is available in black, brown, green, grey, red, white colors. The commercial uses of Icelandite 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.