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