Know all about Porphyry and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry and Picrite belong to Igneous Rocks.Texture of Porphyry is Porphyritic whereas that of Picrite is Earthy, Rough. Porphyry appears Dull and Picrite appears Rough and Shiny. The luster of Porphyry is dull while that of Picrite is subvitreous to dull. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).