Know all about Gritstone and Hyaloclastite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Hyaloclastite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Hyaloclastite is Pyroclastic. Gritstone appears Layered and Foliated and Hyaloclastite appears Dull. The luster of Gritstone is dull while that of Hyaloclastite is dull and grainy. Gritstone and Hyaloclastite are 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 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 Hyaloclastite are cemetery markers, creating artwork.