Know all about Gneiss and Coquina properties here. All properties of rocks are important as they define the type of rock and its application. Gneiss belongs to Metamorphic Rocks while Coquina belongs to Sedimentary Rocks.Texture of Gneiss is Banded, Foliated, Platy whereas that of Coquina is Clastic. Gneiss appears Foliated and Coquina appears Layered, Banded, Veined and Shiny. The luster of Gneiss is dull while that of Coquina is dull to vitreous to submetallic. Gneiss is available in black, brown, pink, red, white colors whereas Coquina is available in beige, buff, orange colors. The commercial uses of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums and that of Coquina are creating artwork.