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