Know all about Picrite and Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite and Syenite belong to Igneous Rocks.Texture of Picrite is Earthy, Rough whereas that of Syenite is Earthy. Picrite appears Rough and Shiny and Syenite appears Banded and Foilated. The luster of Picrite and Syenite is subvitreous to dull. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Syenite is available in brown, buff, cream, green, grey, pink, white 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 Syenite are cemetery markers, creating artwork.