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