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