Know all about Pyrolite and Gneiss properties here. All properties of rocks are important as they define the type of rock and its application. Pyrolite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks.Texture of Pyrolite is Phaneritic whereas that of Gneiss is Banded, Foliated, Platy. Pyrolite appears Rough and Shiny and Gneiss appears Foliated. The luster of Pyrolite is shiny while that of Gneiss is dull. Pyrolite is available in dark greenish - grey colors whereas Gneiss is available in black, brown, pink, red, white colors. The commercial uses of Pyrolite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums.