Know all about Phonolite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Phonolite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Phonolite is Granular whereas that of Chalk is Clastic or Non-Clastic. Phonolite appears Banded and Foilated and Chalk appears Soft. The luster of Phonolite is greasy to dull while that of Chalk is dull. Phonolite is available in brown, buff, cream, green, grey, pink, white colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Phonolite 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.