Know all about Variolite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Variolite and Picrite belong to Igneous Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Picrite is Earthy, Rough. Variolite appears Dull and Soft and Picrite appears Rough and Shiny. The luster of Variolite is not available while that of Picrite is subvitreous to dull. Variolite is available in black, brown, light to dark grey colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).