Know all about Porphyry and Ganister properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry belongs to Igneous Rocks while Ganister belongs to Sedimentary Rocks.Texture of Porphyry is Porphyritic whereas that of Ganister is Clastic, Granular, Rough. Porphyry appears Dull and Ganister appears Rough. The luster of Porphyry and Ganister is dull. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Ganister 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 Porphyry are creating artwork, gemstone, jewelry and that of Ganister are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.