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