Know all about Tachylite and Diatomite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite belongs to Igneous Rocks while Diatomite belongs to Sedimentary Rocks.Texture of Tachylite is Vitreous whereas that of Diatomite is Clastic or Non-Clastic. Tachylite appears Glassy and Diatomite appears Soft. The luster of Tachylite is resinous while that of Diatomite is dull. Tachylite is available in black, dark brown colors whereas Diatomite is available in grey, white, yellow colors. The commercial uses of Tachylite 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.