Know all about Diatomite and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Diatomite belongs to Sedimentary Rocks while Trondhjemite belongs to Igneous Rocks.Texture of Diatomite is Clastic or Non-Clastic whereas that of Trondhjemite is Phaneritic. Diatomite appears Soft and Trondhjemite appears Banded and Foilated. The luster of Diatomite is dull while that of Trondhjemite is subvitreous to dull. Diatomite is available in grey, white, yellow colors whereas Trondhjemite is available in black, brown, light to dark grey, white colors. The commercial uses 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 and that of Trondhjemite are cemetery markers, creating artwork.