Know all about Theralite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Theralite and Picrite belong to Igneous Rocks.Texture of Theralite is Phaneritic whereas that of Picrite is Earthy, Rough. Theralite appears Veined and Shiny and Picrite appears Rough and Shiny. The luster of Theralite is waxy and dull while that of Picrite is subvitreous to dull. Theralite is available in dark grey to black colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Theralite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).