Know all about Blue Granite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite and Picrite belong to Igneous Rocks.Texture of Blue Granite is Phaneritic whereas that of Picrite is Earthy, Rough. Blue Granite appears Shiny and Picrite appears Rough and Shiny. The luster of Blue Granite and Picrite is subvitreous to dull. Blue Granite is available in black, brown, light to dark grey, white colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).