Know all about Gritstone and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Blue Granite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Blue Granite is Phaneritic. Gritstone appears Layered and Foliated and Blue Granite appears Shiny. The luster of Gritstone is dull while that of Blue Granite is subvitreous to dull. Gritstone and Blue Granite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.