Know all about Picrite and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite and Icelandite belong to Igneous Rocks.Texture of Picrite is Earthy, Rough whereas that of Icelandite is Aphanitic to Porphyritic. Picrite appears Rough and Shiny and Icelandite appears Dull and Soft. The luster of Picrite is subvitreous to dull while that of Icelandite is vitreous. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Icelandite is available in bluish - grey, grey, pink, yellow 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 Icelandite are cemetery markers, creating artwork.