Know all about Blue Granite and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite belongs to Igneous Rocks while Chert belongs to Sedimentary Rocks.Texture of Blue Granite is Phaneritic whereas that of Chert is Banded, Rough. Blue Granite appears Shiny and Chert appears Glassy or Pearly. The luster of Blue Granite is subvitreous to dull while that of Chert is waxy and dull. Blue Granite is available in black, brown, light to dark grey, white colors whereas Chert is available in black, brown, green, grey, red, white colors. The commercial uses of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling and that of Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms.