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