Know all about Porphyry and Diatomite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry belongs to Igneous Rocks while Diatomite belongs to Sedimentary Rocks.Texture of Porphyry is Porphyritic whereas that of Diatomite is Clastic or Non-Clastic. Porphyry appears Dull and Diatomite appears Soft. The luster of Porphyry and Diatomite is dull. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Diatomite is available in grey, white, yellow colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry 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.