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