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