Know all about Hyaloclastite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Hyaloclastite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Hyaloclastite is Pyroclastic whereas that of Chalk is Clastic or Non-Clastic. Hyaloclastite appears Dull and Chalk appears Soft. The luster of Hyaloclastite is dull and grainy while that of Chalk is dull. Hyaloclastite is available in brown, grey, yellow colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Hyaloclastite are cemetery markers, creating artwork and that 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.