Know all about Tonalite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Tonalite and Picrite belong to Igneous Rocks.Texture of Tonalite is Phaneritic whereas that of Picrite is Earthy, Rough. Tonalite appears Banded and Foilated and Picrite appears Rough and Shiny. The luster of Tonalite and Picrite is subvitreous to dull. Tonalite is available in black, brown, light to dark grey, white colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Tonalite 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).