Know all about Picrite and Arkose properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Arkose belongs to Sedimentary Rocks.Texture of Picrite is Earthy, Rough whereas that of Arkose is Clastic. Picrite appears Rough and Shiny and Arkose appears Rough and Dull. The luster of Picrite is subvitreous to dull while that of Arkose is dull. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Arkose is available in reddish brown colors. The commercial uses of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo) and that of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones.