Know all about Chalk and Hyaloclastite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Hyaloclastite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Hyaloclastite is Pyroclastic. Chalk appears Soft and Hyaloclastite appears Dull. The luster of Chalk is dull while that of Hyaloclastite is dull and grainy. Chalk is available in grey, white, yellow colors whereas Hyaloclastite is available in brown, grey, yellow colors. The commercial uses of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper and that of Hyaloclastite are cemetery markers, creating artwork.