Know all about Diatomite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Diatomite and Greywacke belong to Sedimentary Rocks.Texture of Diatomite is Clastic or Non-Clastic whereas that of Greywacke is Clastic. Diatomite appears Soft and Greywacke appears Dull. The luster of Diatomite and Greywacke is dull. Diatomite is available in grey, white, yellow colors whereas Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow 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 Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.