Know all about Gneiss and Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Gneiss belongs to Metamorphic Rocks while Porphyry belongs to Igneous Rocks.Texture of Gneiss is Banded, Foliated, Platy whereas that of Porphyry is Porphyritic. Gneiss appears Foliated and Porphyry appears Dull. The luster of Gneiss and Porphyry is dull. Gneiss is available in black, brown, pink, red, white colors whereas Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. The commercial uses of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums and that of Porphyry are creating artwork, gemstone, jewelry.