Know all about Greenschist and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Greenschist belongs to Metamorphic Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Greenschist is Foliated, Platy whereas that of Itacolumite is Clastic, Granular, Rough. Greenschist appears Layered and Shiny and Itacolumite appears Rough. The luster of Greenschist is shiny while that of Itacolumite is dull. Greenschist is available in dark greenish - grey, green colors whereas Itacolumite is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Greenschist are blackboards, manufacture of tools, writing slates and that of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.