Know all about Picrite and Tephrite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite and Tephrite belong to Igneous Rocks.Texture of Picrite is Earthy, Rough whereas that of Tephrite is Aphanitic to Porphyritic. Picrite appears Rough and Shiny and Tephrite appears Vesicular. The luster of Picrite and Tephrite is subvitreous to dull. Picrite and Tephrite are available in black, brown, colourless, green, grey, pink, white, yellow 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 Tephrite are production of lime, soil conditioner.