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