Know all about Phonolite and Diatomite properties here. All properties of rocks are important as they define the type of rock and its application. Phonolite belongs to Igneous Rocks while Diatomite belongs to Sedimentary Rocks.Texture of Phonolite is Granular whereas that of Diatomite is Clastic or Non-Clastic. Phonolite appears Banded and Foilated and Diatomite appears Soft. The luster of Phonolite is greasy to dull while that of Diatomite is dull. Phonolite is available in brown, buff, cream, green, grey, pink, white colors whereas Diatomite is available in grey, white, yellow colors. The commercial uses of Phonolite are cemetery markers, creating artwork and that of Diatomite are alumina refineries, animal feed filler, as a feed additive for livestock, creating artwork, drawing on blackboards, fire resistant, gymnasts, athletes and mountain climbers use for grip, in aquifers, soil conditioner, to ignite fire, used as a filter medium, used as an insecticide, whiting material in toothpaste, paint and paper.