Know all about Gritstone and Coquina properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone and Coquina belong to Sedimentary Rocks.Texture of Gritstone is Earthy whereas that of Coquina is Clastic. Gritstone appears Layered and Foliated and Coquina appears Layered, Banded, Veined and Shiny. The luster of Gritstone is dull while that of Coquina is dull to vitreous to submetallic. 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 Coquina is available in beige, buff, orange 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 Coquina are creating artwork.