Know all about Diorite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Diorite and Picrite belong to Igneous Rocks.Texture of Diorite is Phaneritic whereas that of Picrite is Earthy, Rough. Diorite appears Shiny and Picrite appears Rough and Shiny. The luster of Diorite is shiny while that of Picrite is subvitreous to dull. Diorite 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 Diorite are 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).