Know all about Picrite and Oolite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Oolite belongs to Sedimentary Rocks.Texture of Picrite is Earthy, Rough whereas that of Oolite is Clastic or Non-Clastic. Picrite appears Rough and Shiny and Oolite appears Rounded and Rough. The luster of Picrite is subvitreous to dull while that of Oolite is pearly to shiny. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow 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 Oolite are creating artwork, jewelry, used in aquariums.