Know all about Picrite and Gossan properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Gossan belongs to Metamorphic Rocks.Texture of Picrite is Earthy, Rough whereas that of Gossan is Rough, Sandy. Picrite appears Rough and Shiny and Gossan appears Dull and Banded. The luster of Picrite is subvitreous to dull while that of Gossan is metallic. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Gossan is available in brown, brown- black, gold, green, rust 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 Gossan are cemetery markers, commemorative tablets, gemstone.