Know all about Mudstone and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Mudstone belongs to Sedimentary Rocks while Picrite belongs to Igneous Rocks.Texture of Mudstone is Clastic whereas that of Picrite is Earthy, Rough. Mudstone appears Rough and Dull and Picrite appears Rough and Shiny. The luster of Mudstone is dull while that of Picrite is subvitreous to dull. Mudstone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Mudstone are creating artwork, pottery and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).