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