Know all about Picrite and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite and Rhyolite belong to Igneous Rocks.Texture of Picrite is Earthy, Rough whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Picrite appears Rough and Shiny and Rhyolite appears Banded. The luster of Picrite is subvitreous to dull while that of Rhyolite is earthy. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Rhyolite is available in grey, white, light black 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 Rhyolite are gemstone, laboratory bench tops, jewelry.