Know all about Flint and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Flint belongs to Sedimentary Rocks while Blue Granite belongs to Igneous Rocks.Texture of Flint is Banded, Rough whereas that of Blue Granite is Phaneritic. Flint appears Glassy or Pearly and Blue Granite appears Shiny. The luster of Flint is vitreous while that of Blue Granite is subvitreous to dull. Flint 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 Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.