Know all about Diatomite and Foidolite properties here. All properties of rocks are important as they define the type of rock and its application. Diatomite belongs to Sedimentary Rocks while Foidolite belongs to Igneous Rocks.Texture of Diatomite is Clastic or Non-Clastic whereas that of Foidolite is Earthy. Diatomite appears Soft and Foidolite appears Dull. The luster of Diatomite is dull while that of Foidolite is subvitreous to dull. Diatomite is available in grey, white, yellow colors whereas Foidolite is available in black, brown, colourless, green, grey, pink, 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 Foidolite are cemetery markers, commemorative tablets, creating artwork.