Know all about Diatomite and Rapakivi Granite properties here. All properties of rocks are important as they define the type of rock and its application. Diatomite belongs to Sedimentary Rocks while Rapakivi Granite belongs to Igneous Rocks.Texture of Diatomite is Clastic or Non-Clastic whereas that of Rapakivi Granite is Granular, Phaneritic. Diatomite appears Soft and Rapakivi Granite appears Veined or Pebbled. The luster of Diatomite is dull while that of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous. Diatomite is available in grey, white, yellow colors whereas Rapakivi Granite is available in black, grey, orange, 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 Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones.