Know all about Tephrite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite and Picrite belong to Igneous Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Picrite is Earthy, Rough. Tephrite appears Vesicular and Picrite appears Rough and Shiny. The luster of Tephrite and Picrite is subvitreous to dull. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).