Know all about Blue Granite and Flint 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 Flint belongs to Sedimentary Rocks.Texture of Blue Granite is Phaneritic whereas that of Flint is Banded, Rough. Blue Granite appears Shiny and Flint appears Glassy or Pearly. The luster of Blue Granite is subvitreous to dull while that of Flint is vitreous. Blue Granite is available in black, brown, light to dark grey, white colors whereas Flint 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 Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms.