Know all about Troctolite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite and Picrite belong to Igneous Rocks.Texture of Troctolite is Phaneritic whereas that of Picrite is Earthy, Rough. Troctolite appears Veined and Shiny and Picrite appears Rough and Shiny. The luster of Troctolite is not available while that of Picrite is subvitreous to dull. Troctolite 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 Troctolite are cemetery markers, commemorative tablets, 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).