Know all about Quartzite and Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Quartzite belongs to Metamorphic Rocks while Porphyry belongs to Igneous Rocks.Texture of Quartzite is Foliated, Granular whereas that of Porphyry is Porphyritic. Quartzite appears Lustrous and Porphyry appears Dull. The luster of Quartzite is vitreous while that of Porphyry is dull. Quartzite is available in black, blue, brown, green, light grey, purple, white, yellow colors whereas Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. The commercial uses of Quartzite are an oil and gas reservoir, as armour rock for sea walls, cemetery markers, commemorative tablets, in aquifers, laboratory bench tops, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones, used in aquariums and that of Porphyry are creating artwork, gemstone, jewelry.